Physics sandbox — pour sand, water, fire, and other elements and watch them interact
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The best browser implementation of the falling sand genre — fast, well-tuned element interactions, and open source. Hypnotic viewing without needing any particular goal.
30-∞ min
Build anything you can imagine with blocks — the 2009 original
15-90 min
Build charming island towns block by block — a pure creative toy
20-120 min
Combine elements to create new items — 560 combinations to discover
The main elements include sand, water, oil, fire, plant, lava, ice, stone, wood, and several others. Each has unique interaction rules — for example, oil floats on water and ignites easily, while stone is inert.
Not directly in the browser — there is no built-in save. Take a screenshot to preserve your canvas. The open-source community hosts extended versions with additional features including save support.
The original 'falling sand game' was a Java applet that circulated on forums around 2005. Max Bittker's Sandspiel is a modern WebAssembly reimplementation with improved performance and a cleaner interface.