Will it float?

Today for news Oliver shared the cool piece of pumice that he found in his sheep paddock.  We wondered how it got there. Later in the day when Leo was looking at it he wondered about whether it would float. We all made predictions about whether we thought it would float. When we put it in the bucket it did float! We now wonder if the small holes in it will slowly fill up with water and it might sink after a while. We are going to leave it over night and see what happens.