Sand Sim - a free falling-sand physics sandbox
Sand Sim is a free browser falling-sand sandbox. Paint sand, water, stone, wood, and fire onto a canvas and watch real particle physics take over as they pile up, flow, and interact with each other. Just open this page and start placing, nothing to download or sign up for.
How to Play
- Pick a material - sand, water, stone, wood, fire, or the eraser.
- Click or drag across the canvas to paint that material.
- Sand falls and piles up naturally, sinking through water.
- Water flows downhill and spreads out sideways to fill space.
- Fire spreads to nearby wood and burns out over time.
- Water extinguishes fire on contact.
- Use Clear to wipe the canvas and start a fresh scene.
Frequently Asked Questions
- How do you play Sand Sim?
- Pick a material from the row of buttons below the canvas, then click or drag across the canvas to paint it. Sand piles up and falls, water flows downhill and spreads out, fire burns nearby wood, and water put out fire on contact.
- What are the controls for Sand Sim?
- Sand Sim is played entirely with clicks, drags, or touch - select a material, then click, drag, or swipe across the canvas to place it.
- Is Sand Sim free to play?
- Yes, Sand Sim is completely free, with no account, login, or app download required.
- Does Sand Sim save what I built?
- No - Sand Sim is a purely creative sandbox with no score or save feature, so the canvas resets each time you reload the page. Use the Clear button to start over at any time during a session.
- What materials can I use in Sand Sim?
- Sand, water, stone, wood, fire, and an eraser to clear cells. Stone is a solid, static wall, while sand and water both respond to gravity, and fire and wood interact when placed next to each other.