Floating and Sinking

We have really enjoyed experimenting with floating and sinking. In the forest school area we investigated which materials would float and which would sink. 

We found out that a ball of Plasticine would sink so we posed ourselves a question:
Can you make a ball of Plasticine float? 

We discovered that by changing the shape of the plasticine you could make it less dense than the water and so it would float!