Free · Draw with tiny moving materials

Falling Sand Playground for Kids

Paint sand, water, stone, wood, plants, and ice, then watch thousands of tiny cells move and change.

  • Clear, kid-friendly steps
  • Private in your browser
  • No signup

Creative cell experiments

Falling sand playground

Paint sand, water, stone, wood, plants, and ice, then watch the tiny cells change.

Active cells 0 Steps 0 Brush Sand Opening experiment
Choose a material and draw. Press Start motion when your scene is ready.Draw on the experiment. Arrow keys move the keyboard cursor; Enter paints.

Runs only in this tab with Sandspiel’s local WebAssembly core. No login, gallery, chat, ads, uploads, or saved creations.

Powered by Sandspiel, an open-source library available under MIT.

Three simple steps

How to use it

  1. Choose a material and draw on the large experiment area.
  2. Pick a motion speed, then start, pause, or undo while the cells change.
  3. Reset to restore the starter scene. Nothing is uploaded or saved.

Private by default

Your words and choices stay in this browser tab. There are no accounts, uploads, ads, or trackers inside the tool. Close the tab and the working data is gone.