How to Play: Mouse / touch:

• Left click or tap and drag: draw with the selected material or tool
• Right drag or Shift + drag: move the camera
• Mouse wheel or pinch: zoom

Keyboard:

• Space: pause / play
• . : step one frame (while paused) or speed up
• , : slow down
• Ctrl + Z: undo
• [ and ]: smaller / bigger brush
• + / - / 0: zoom in, zoom out, reset zoom
• V: switch view (materials, temperature, flammability)
• R: room settings
• G: goals and reactions
• M: sound on / off
• Esc: close the open window

SandLab is a falling-sand physics sandbox with over 270 materials that react to each other on their own. Pour sand, flood it with water, drop lava into the lake and watch it hiss into steam and harden into stone. Acid eats through metal, current runs along wires, plants grow toward water, gunpowder goes boom.

Set up the room the way you want: change the temperature from deep space cold to blazing heat, turn gravity down, off or upside down, add wind and speed up heat flow. Presets like Moon, Arctic, Inferno and Upside down are one click away.

Discover all 199 reactions and fill your lab notebook. Short goals teach the basics and point you to new experiments: boil water, grow a plant, make glass, light a lamp, bake bread, forge bronze.

Features:

• 270+ materials: powders, liquids, gases, metals, chemicals, food, life and special elements like cloner, void and black hole
• 199 reactions to discover, 20 goals
• Room settings: temperature, gravity, wind, heat flow
• Heat map and flammability views
• Pause, step frame by frame, slow motion or 4x speed
• Undo, zoom, three save slots plus autosave