Sandlab - Falling Sand Physics

Drag your finger and sand pours out. It piles up, collapses, soaks in water, catches fire, and melts into glass. Sandlab is a falling-sand physics sandbox where 23 elements react for real. No goals, no score, no way to lose. Pour something in and watch what happens. ■ 23 elements Stone · Sand · Water · Oil · Fire · Wood · Lava · Steam · Smoke · Acid · Ice · Gunpowder · Salt · Plant · Metal · Spark · Glass · Snow · Concrete · Coal · Ash · Slime · Seed Powders pile up, liquids flow, gases rise. Density decides what sinks, so oil floats on water while slime sinks straight to the bottom. ■ Reactions worth watching · Sand melts near lava and fire and hardens into glass · Lava hitting water turns to stone while steam billows up · Water puts out fire, and steam condenses back into water over time · Gunpowder chain-explodes the moment a flame reaches it · Wood, oil, plants and coal burn away and leave smoke and ash · Seeds sprout next to moisture, and plants grow along the water · Concrete cures into stone when it touches water · Acid dissolves almost everything except stone and glass · Electricity travels along metal and water and ignites oil, wood and gunpowder The in-app reaction guide lists every rule in one place. ■ Controls that feel right · Five tools: pen, spray, fill, eyedropper and pan (zoom & drag) · Multi-touch pouring — hold your finger down and it keeps flowing like a tap · Brush size slider and mirror mode for symmetrical builds · Undo, pause and clear all · Wall presets — cup, funnel, test tube and hourglass — to start experimenting instantly · Tilt gravity: tilt your device and the sand flows that way ■ Keep it and show it · Save the canvas as a PNG image and share it · Record the motion as an animated GIF and share it · Store canvases in save slots and load them back any time · Classic, neon and pastel color skins, simulation speed control, high-resolution canvas ■ Made for you if · Watching things flow and settle helps you unwind · You like powder games, falling sand toys and physics simulations · You want to ask a kid "what happens if we mix these two?" · You need something to fiddle with for a few minutes, offline ■ Light and safe · No sign-up, no login, no account · Canvases and settings stay on your device · No camera, location, storage or contacts permission is requested · Internet is used only to serve ads — the simulation works fully offline · 10 languages (Korean, English, Japanese, Chinese, Spanish, Portuguese, French, German, Indonesian, Vietnamese) · Pick your language on first launch; light and dark theme Some features (premium elements, GIF recording, mirror mode, color skins, advanced tools, high-resolution canvas, extra save slots) unlock by watching a short ad. Unlock once and it stays unlocked, and there are no in-app purchases. Watching one ad can also hide the bottom banner for 24 hours. Contact: [email protected]