Why light objects remains under water?

[noel]

When I give the object under the water, he does not rise to the top.
An object with a smaller volume of water should float out.

[electronicboy]

the problem is is that phun doesnt simulate water good enougth to do this. water compresses to easily allowing the object to just fall through it.

this is why most people decided to use fake water in phun and even in algodoo!