Float, Sink, or Swim?

We did a little science experiment today to see which of our toys would sink or float.  I got a big glass bowl out and filled it with water and then I had each kid go find a toy that could get wet.  Since they all picked something that I knew would float, I grabbed something that I knew would sink.  We made a chart with "Sink" and "Float" at the top and then listed our items down the side.  We had a Lego, a plastic cow, a plastic block, and a  key.  We tried to guess first which items would sink and which would float, then we checked the appropriate column on our chart after we dropped each one in the water.  Then we talked about hypothesis and how we could now make some pretty educated guesses about other items.  Rachel ran outside and got a rock, then Ford tried a pencil.  Ruby just kept wanting to put her cow in the water.  After lots of wet toys, we decided to summarize by saying that things made out of plastic and wood tended to float and things made out of rock or metal would sink.  Then we went outside to try some things out in the water table, but that turned into too much craziness before lunch time so we saved water park for after nap time and swam and played in the pool and the mud for two hours!!!