Have some fun on a summer day and study bouancy at the same time. Make a paper boat! If you use newspaper, you can also talk about conservation (reuse). Work some mathematics into this activity by talking about the different shapes formed by the folding. How many triangles can you see?
It really is pretty easy, but is difficult to describe with just instructions. So here is a great video from HowCast showing how to make a paper boat:This article is part of the Density and Buoyancy series. See the list below for links to the other articles in this series.