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]