You Will Need:
a clear container of water large enough for your objects to fit in. Objects to experiment with (rocks, feathers, paper, bread, plastic toys, etc.)
Set up one or more clear bins filled with water. Help your child find items to experiments with. Ask your child to predict which items will sink and which items will float. Place items in the water and observe. Ask, what do you see happening? Why do you think thats happening?
Find some items that have suprising results. ( A jar with an airtight lid on seems like it should sink, but it floats)