没有教学，没有叙事。只有玩具。生成一颗行星，观察它的轨道；让十万颗小球穿过钉阵下落，看着一条钟形曲线成形；点击一个物体直到它碎裂。摆弄规则，看看接下来会发生什么。
Swing a heavy iron ball on a chain and watch a stacked brick wall topple, tumble and scatter under a real impulse-based rigid-body solver.
Pluck an elastic sheet of point masses and watch ripples race across the grid, reflect off pinned edges and interfere — a trampoline solved as a live network of damped springs.
Grab, poke and pile up squishy gas-pressure blobs — mass-spring shells that wobble, deform and bounce back to plump under a pressure-preserving solver.
Rack the balls, drag the cue to aim, and let elastic collisions, rolling friction and corner pockets play out a full break on green felt.
Rain thousands of balls through a triangular peg lattice and watch the central limit theorem build itself — a live histogram converging on the Gaussian, skewable left or right.
A row of pendulums tuned by length swings into traveling waves, splinters into clusters and chaos, then snaps back into one wave as they rephase.
Lift the chrome spheres and let them clack — momentum and energy ripple through the touching line and fly out the far end.
Build a Rube-Goldberg contraption from ramps, pegs and bumpers, then unleash a glittering cascade of marbles that bounce, scatter and pour through everything you place.
Buoyant blobs of molten wax heat at the base, swell and rise, cool and sink — merging and splitting as glowing metaballs.
Drop massive stars and watch thousands of test particles braid themselves into glowing orbital streams under softened Newtonian gravity.
The classic powder toy: paint sand, water, oil, fire and living plant onto a cellular-automaton grid and watch them pile, flow, float, ignite and grow.
Two coherent waves interfere into bright and dark fringes — then fire quanta one at a time and watch the very same pattern rebuild itself, dot by dot.
点击任意 3D 物体，使其碎裂成在重力作用下坠落的 Voronoi 碎片。按 R 键可将碎片重新合拢。
把观象台变成一个 3D 空间操作系统——每个板块都化为一面悬浮在暗室中的面板，你可以拖动它、把它推向纵深、飞入其中。让导航变得空间化。
点击生成行星，拖动设定速度，观看轨道力学的演化——共振、抛射、俘获。可通过 URL 分享场景。
两个模拟并排呈现：十万颗小球穿过高尔顿钉板形成钟形曲线，以及 64 个双摆从近乎相同的初始状态发散开来。
穿行于一条由物理模拟布料面板构成的无尽隧道——滚动以向前飞行，移动鼠标让布料泛起涟漪。