About Sink or Float

Sink or Float is a first science game. An object appears — an apple, a rock, a rubber duck — and you guess whether it will sink or float in water. Each answer explains why. Twenty everyday things to try.

How to play

1. Look at the object.
2. Tap Float or Sink.
3. Read why!

Tips

Things full of air float. Heavy, solid things sink. Try it in the bath!