Is Sink or Float free to play?

Yes, 100% free — no download, no account, no payment. Open your browser and play instantly.

Does it work on mobile?

Yes. The game uses HTML5 and runs on Chrome, Safari and Firefox on Android and iOS devices.

How do I save my progress?

Progress auto-saves to your browser's local storage. Avoid clearing browser data to keep your save file.

Can I play with a friend?

Some modes support local 2-player on the same device. Check the main menu for multiplayer or co-op options.

The game is lagging — what can I do?

Close other browser tabs to free up memory, or try a different browser. Chrome generally provides the best performance for HTML5 games.

Sink or Float

game.aboutGame

Embark on a fascinating journey into the world of physics with Sink or Float. This game is designed to challenge a youngsters understanding of buoyancy and mass in an entertaining way. The player is presented with various objects and their task is to predict whether these objects will sink or float when dropped into water. Each correct answer earns the player points, making the game engaging and educational.