mini games
89 physics toys & simulations, organized by theme
balance & body physics (12)
pendulums, tightropes, unicycles - keeping things upright
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Tightrope Balance
Guide a tightrope walker across a high wire using subtle tilts to counterbalance gravity and wind - inverted pendulum physics with ragdoll falls
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Balancing Broom
Keep a broom balanced on your palm using mouse or keyboard - inverted pendulum physics with wind gusts, random nudges, and ramping difficulty
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Balancing Pole
Slide a base to keep one or more poles balanced upright - inverted pendulum physics with wind perturbations and trail visualization
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Stilt Walker
Balance and walk on independently controlled stilts over uneven terrain - alternate stilt steps with Q/W and O/P while leaning to keep your inverted-pendulum body upright
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Unicycle Balancer
Control pedaling and leaning independently to ride a unicycle across terrain - inverted pendulum physics with gyroscopic wheel stabilization
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Unicycle Juggler
Balance a unicyclist while juggling balls - manage inverted pendulum physics and rhythmic tosses simultaneously in this multitask challenge
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Cat Landing Simulator
Twist a falling cat mid-air to land on its feet - control body curls and tail swing to exploit angular momentum conservation and the righting reflex
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Swing Set Stunt
Pump a swing with rhythmic leans to gain height, then launch at the perfect moment for maximum distance - pendulum physics with ragdoll landings
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The Drunken Waiter
Balance a tray of wine while walking - compensate for sloshing SPH fluid shifting your center of mass
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Gyroscope Balancer
Spin a virtual gyroscope and tilt the base to see precession, nutation, and wobble - add loads, adjust gravity, and watch angular momentum in action
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Chaos Pendulum
Double or triple pendulum simulator with chaotic motion traces - set initial angles and watch sensitive dependence on initial conditions create beautiful pattern art
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The Human Tower
Collaborative ragdoll stacking - build a castell by stacking humans on each other's shoulders while managing muscle fatigue and structural buckling
creature & robot control (8)
multi-limbed locomotion, QWOP-style body coordination
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Suction Cup Climber
Attach and detach suction-cup limbs to inch up a glass wall - per-limb grip control with fatigue, wind, slippery patches, and ragdoll falls on failure
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Sticky Hand Climber
Drag and fling stretchy limbs to find holds and haul a squishy jelly body up an endless vertical wall
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Quadruped Locomotion
Control front and back leg groups to make a four-legged creature walk, trot, and gallop across terrain with full body joint constraints
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Spider Leg Controller
QWOP-style arachnid locomotion - control each of eight spider legs independently to walk, stumble, and fall
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Snake Segment Slider
Coordinate body wave timing to slither a segmented snake across terrain - manual joint sliders or auto serpentine, sidewind, concertina, and inchworm gaits
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The Soft Robot Walker
Pneumatic silicone robot locomotion - inflate limbs with QWER keys and crawl using friction anisotropy from scales
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The Oobleck Run
QWOP-like rhythm game on non-Newtonian fluid - keep stomping or sink into the cornstarch!
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Neural Network Creature
Tune a feedforward neural network to control a creature - adjust weights to make it seek food, avoid walls, and survive
flight & vehicles (5)
things that fly, fall, and steer through the air
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Parachute Steering Challenge
Steer a parachute for a controlled descent - adjust left and right toggles to guide a skydiver's canopy through wind fields and aim for a gentle landing on the target
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Hang Glider Simulator
Launch from a cliff and soar through thermals - tilt to steer, find rising air columns, and stay aloft as long as possible with lift, drag, and variometer physics
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Crane Operator Challenge
Operate boom rotation, trolley, and winch separately to move loads while managing pendulum sway and wind
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Paper Airplane Designer
Design, fold, and throw paper airplanes - tweak wingspan, sweep, dihedral, nose weight, and trim to maximize distance or perform stunts with approximate aerodynamic physics
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Wind Tunnel Simulator
Place shapes in a virtual wind tunnel and observe airflow visualization with smoke lines, pressure fields, streamlines, and drag force indicators
fluids & particles (13)
liquids, sand, clouds, and things that flow, splash, and scatter
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The Ferrofluid Dancer
Simulation of ferromagnetic fluid manipulated by magnets - watch the fluid dance and form crystalline spikes
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The Mercury Maze
Tilt the board to guide liquid mercury through mazes - shatter and coalesce droplets to reach the exit
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The Lava Lamp Designer
Thermal convection simulator - tune heat and cooling to achieve the perfect hypnotic bloop frequency
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The Wet Soap
Grip simulator - hold slippery soap in the shower as lather builds and dynamic friction drops. The tighter you squeeze, the faster it shoots out
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Water Hose & Breakables
Spray a high-pressure water jet at stacks, walls, and sculptures made of clay, stone, glass, and wood - erode soft materials and topple rigid-body structures with fluid force
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Ball Pit Simulator
Fill a pit with hundreds of colorful balls, then launch heavy balls, bowling balls, and bombs into them to watch chaotic scattering with spatial-hash collision physics
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Colliding Balls Box
Spawn bouncy balls, adjust gravity and elasticity, and watch collisions, swarms, and cascades in a box with tunable restitution, trails, and slow motion
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Cloud Sculpting Toy
Pinch, pull, and smooth a fluffy volumetric cloud - build up density until it darkens and rains, with wind drift and sun-driven evaporation
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Balloon Inflation & Pop
Pump air into stretchy balloons and watch them expand, wobble, and burst - manage pressure, elasticity, and thickness to avoid popping
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The Hourglass Filler
Granular physics toy - design vessel shapes and calibrate sand flow to measure exactly one minute, fighting jamming and arching
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Particle Fountain Art
Place emitters, obstacles, and attractors to compose flowing particle fountains and sand streams - a kinetic art canvas with glow, trails, and gravity
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The Avalanche Patrol
Snow physics simulator - ski down slopes, probe for weak layers, and place explosives to trigger controlled slab avalanches
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Fireworks Show Designer
Place fireworks on a night sky, set their timing on the timeline, then sit back and watch your custom show explode with procedural particle effects
life & ecosystems (14)
biology, plants, fungi, evolution, and living systems
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The Slime Mold City
Bio-computation toy using Physarum polycephalum algorithms to solve urban transport networks
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Slime Mold Network
Place food and obstacles for a Physarum-inspired slime mold - watch it search, optimize, and prune paths in a glowing petri dish
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The Root Bound
Underground root architecture puzzle - guide root tips around rocks while your tail lignifies behind you
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The Moss Terrarium
Voxel ecosystem sim in a glass jar - manage the water cycle and grow competing moss species
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The Mycelium Web
Reverse-dungeon crawler - spread fungal hyphae through wooden structures and decompose them back to soil
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The Ivy Climber
Procedural vine simulator with phototropism and thigmotropism - watch vines seek light and climb supports
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The Coral Reef Builder
Calcium carbonate deposition simulator - place polyps, adjust currents and light, balance top-heavy growth against breakage
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The Wild Garden Grower
Scatter seeds and tweak rain and sun to grow a wild meadow - watch plants compete for light and soil moisture while insects visit the flowers
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Bonsai Tree Sculpting
Prune branches and wait for regrowth to sculpt a living bonsai - adjust sunlight, wind, and season with botanical branching rules
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Predator Prey Ecosystem
Spawn herbivores, predators, and plants on a grassy field - watch Lotka-Volterra population cycles and food chain dynamics emerge from simple rules
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Evolution Creature Lab
Spawn creatures with genetic traits, watch them compete for food and evade predators, and observe locomotion strategies emerge over generations via natural selection
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Microbial Petri Dish
Drop microbes and nutrients into a petri dish - watch colorful colonies grow, compete for resources, and respond to antibiotics, heat, and UV light
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Plant Breeding Garden
Cross-pollinate flowers and breed new varieties - select parents, combine genetic traits for petal shape, color, and pattern, and watch offspring grow with mutations
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The Ant Lion Trap
Predator-prey physics toy - dig conical pits in sand at the critical angle of repose to trap wandering ants with avalanches
structures & machines (10)
building, engineering, mechanisms, and destruction
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The Tensegrity Architect
Build impossible-looking floating structures using tensional integrity - connect rigid bars with flexible cables
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The Spider Web Engineer
Orb weaver simulator - shoot silk to build frame, radii and capture spiral, then withstand wind and catch insects
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The Puppet Rigger
Marionette physics toy - control the airplane cross-brace to make your puppet walk using inverse dynamics and pendulum momentum
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The Marionette Surgeon
Control surgical hands via marionette strings - extract splinters, remove bullets, and stitch wounds with pendulum physics
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Mechanical Linkage Workshop
Connect rods, pivots, gears, and motors to design mechanisms, walkers, and moving sculptures with constraint-based physics and blueprint-style rendering
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Bridge & Beam Sandbox
Build structures with beams, joints, and supports then stress test them with loads and earthquakes - watch beams deform under strain and snap when overloaded
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The Compliant Switch
Design toy for compliant mechanisms - create bistable snapping structures using flexible beams with FEA-inspired stress visualization
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Balloon & Weight Contraption
Tie balloons and weights into floating rigs - find stable hovering combinations by balancing buoyancy and mass with strings, wind, and gravity
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The Hydraulic Press
Destruction toy with plastic deformation - crush objects with a hydraulic press and watch them flatten, crack, and explode
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Crash Test Playground
Send vehicles and ragdoll dummies through crash courses with breakable obstacles, slow-motion replay, and 4 course presets
waves, sound & music (9)
acoustics, vibrations, cymatics, and generative music
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The Chladni Plate
Cymatics toy - bow a metal plate covered in sand and watch geometric patterns form at the nodal lines of standing waves
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The Interferometer
Wave physics puzzle - place emitters in a ripple tank and create quiet zones via destructive interference
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The Doppler City
Traffic soundscape toy - design roads and place buildings to shape a city's acoustic landscape with Doppler effect, reflections, and noise barriers
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Sound Wave Sandbox
Place speakers, walls, and a listener to visualize wave propagation, interference, and reflection in a top-down acoustic field
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Wind Chime Simulator
Arrange virtual chimes of different materials and control wind to create generative chime music as they collide
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Rhythm Echo
Tap beats to spawn bouncing echo balls that produce pitched sounds on every bounce, creating polyrhythmic patterns as they settle into faster subdivisions
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Melody Droplets
Drop balls onto pitched bars and let gravity compose - bouncing balls trigger notes on collision in this physics-powered melodic playground
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Bouncing Sequencer
Release balls into a pinball-like table of bumpers and pads to create rhythmic drum loops from repeating bounces with reactive lights
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Generative Music Garden
Place bouncing, orbiting, and drifting musical nodes that emit notes on collision - compose generative music through physics with scales, reverb, and presets
light & optics (4)
refraction, shadows, caustics, and visual perception
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The Prism Garden
Light refraction toy - place glass prisms, lenses, and blocks to split white light into spectral rainbows using Snell's law and chromatic dispersion
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The Caustic Pool
Water light toy - disturb a pool surface and watch refracted sunlight cast focused caustic patterns on the floor below
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The Shadow Caster
3D-to-2D projection puzzle - rotate an amorphous blob to cast a specific shadow shape on the wall
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Optical Illusion Workshop
Tweak parameters of 11 classic optical illusions - Mueller-Lyer, Ebbinghaus, Cafe Wall, Hermann Grid, Ponzo, and more perception hacks with interactive controls
gravity & space (4)
orbits, galaxies, impacts, and force fields
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The Galaxy Formation Sandbox
N-body gravity sandbox - place stars, gas clouds, and black holes, fling them into orbit, and watch tiny galaxies swirl, collide, and merge
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Orbital Gravity Sandbox
Place celestial bodies and flick them into orbit - N-body gravity with Keplerian orbit visualization, trajectory prediction, and speed-colored trails
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Impact Sandbox
Fire meteors at terrain and watch craters form, shockwaves ripple, and debris scatter with tunable impact physics and planetary presets
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Magnetism Sandbox
Drag magnets, scatter iron filings, and place metal pieces to explore magnetic field lines, attraction, and repulsion with real-time particle simulation
patterns & emergence (6)
cellular automata, fractals, flocking, and self-organization
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Cellular Automata Lab
Paint initial cell patterns and press play - watch evolving life-like patterns with a rule editor, multiple presets (Life, Brian's Brain, Wireworld), color modes, and grid-based cellular automata
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Game of Life Designer
Draw starting cells and run cellular automata - create patterns on a grid and watch them evolve under classic Conway's Life or custom B/S rules with preset patterns
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Reaction Diffusion Canvas
Place reagents and adjust reaction sliders to generate organic stripes, spots, and pulsing textures - a living painting toy based on the Gray-Scott model
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Boids Flocking Simulation
Spawn a flock of boids and drag predators or obstacles - observe emergent group motion from cohesion, separation, and alignment rules
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Fractal Explorer
Pan, zoom and adjust parameters to explore Mandelbrot, Julia, Burning Ship, and Tricorn fractals with smooth coloring, glow effects, and deep zoom presets
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Crystal Garden
Drop mineral seeds and watch crystal clusters branch, merge, and compete for space using diffusion-limited aggregation with nutrients, barriers, and heat
higher dimensions & geometry (5)
4D, hyperbolic space, non-orientable surfaces, and Flatland
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The Hyperbolic Gardener
Farm on a Poincaré disk where space grows exponentially - plant seeds, water crops, and harvest in a world where parallel rows diverge
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The 4D Packer
Bin-packing in 4 dimensions - fit tesseract pieces into a 4D truck by rotating objects through the W-axis and viewing 3D cross-sections
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4D Tetris
Classic Tetris, but the board is 4D - rotate through six planes (including XW/YW/ZW), clear full 3D layers, and climb combos with hold, previews, and a tutorial FTUE
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The Klein Bottle Blower
Glass blowing in non-orientable space - sculpt surfaces where inside connects to outside and the neck passes through the body
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The Slice World
Flatland simulator - play as a 3D sphere in a 2D world, seeing 3D objects as growing/shrinking cross-section circles