Lab · Cosmos · Clockwork
Simulators
Each simulation has its own visual language — not a one-size dark canvas. Explore systems, change parameters, watch results live.
States of matter
ChemistryMolecular motionInteractive states of matter simulator: solid, liquid, and gas. Watch particles vibrate, flow, or fly free. Free educational chemistry/physics demo in the browser.Open simulator →N-body gravity
PhysicsGravity sandboxFree N-body gravity simulator in the browser. Orbit, binary, or cluster presets; tweak G; tap to add masses with trails. Educational physics playground.Open simulator →Simple harmonic
PhysicsPendulumSwing a pendulum, change length and damping, drag to set the angle. See period and energy in a brass clockwork lab.Open simulator →Sensitive dependence
PhysicsDouble pendulum chaosClassic double pendulum chaos lab. Adjust initial angles, rod lengths and masses; watch the second bob draw a fading trail. Optional damping, gravity, pause, reset and slight-perturbation to show sensitive dependence. Lightweight canvas, EN+ES.Open simulator →Ballistics lab
PhysicsProjectile motionLaunch a projectile: set angle and speed, toggle air drag, and compare the ideal parabola with the real path. Range, height, and flight time live.Open simulator →Lenses & mirrors
PhysicsOptics benchRay diagram lab: converging and diverging lenses, concave and convex mirrors. Move the object, change focal length, see image distance and magnification.Open simulator →Series & parallel
PhysicsDC circuit labBuild series or parallel resistor circuits, tweak battery voltage, optional LED drop. Live current, voltage drops, and power with animated flow.Open simulator →Food chain
MathEcosystemThree-level food chain: plants, herbivores, predators. Tune growth, grazing, and hunting — watch populations balance or collapse.Open simulator →Outbreak model
MathSIR epidemicClassic SIR compartments: susceptible, infected, recovered. Tune β, γ, and vaccination. Watch R₀ and the epidemic curve.Open simulator →Supply & demand
MathMarket equilibriumShift supply and demand curves, add a per-unit tax, and see equilibrium price, quantity, revenue, and surplus.Open simulator →String harmonics
PhysicsStanding waveA string fixed at both ends. Pick the harmonic, amplitude, and tension. Nodes stay still; wavelength is L/n (L = 1.2 m).Open simulator →Two sources
PhysicsWave interferenceTwo coherent sources. Adjust frequency, separation and phase difference. Watch constructive and destructive interference form live on canvas.Open simulator →Normal distribution
MathGalton boardBalls fall through pegs, randomly left or right, and pile up into a Gaussian bell curve. Adjust rows, speed, drop batches, and watch the distribution form live.Open simulator →Emergent flocking
PhysicsBoids Flocking LabLive flock of colored particles following separation, alignment and cohesion. Adjust rule strengths, speed and perception radius. Trails, color by velocity or neighbors, mild mouse attraction. Pure evolving system visualization.Open simulator →Turing patterns
ChemistryReaction-Diffusion LabInteractive Gray-Scott reaction-diffusion lab. Adjust feed and kill rates, diffusion coefficients, and color maps. Presets for spots, stripes, mazes, and labyrinths. Live evolving canvas with seed brush to paint activator, pause/reset, and visual organic patterns that emerge over time. Lightweight 2D grid simulation for browser, EN+ES parity.Open simulator →