Play with sand, water, and fire in this physics simulation. No AI needed.
Falling Sand Sandbox is a free, browser-based physics simulation where you paint particles — sand, water, fire, and walls — and watch them interact in real time. No AI is involved; it is a pure physics sandbox that runs on your computer with no data sent to any server.
Select an element
Choose from sand, water, fire, wall, or other available particle types.
Paint on the canvas
Click or drag to place particles on the grid. On mobile, use touch to draw.
Watch the physics
Sand piles up, water flows and pools, fire rises and fades — observe how elements interact with each other.
Experiment and combine
Try building walls to contain water, dropping sand into fire, or creating elaborate chain reactions.
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