Our second Science Camp dealt with buoyancy with the kids creating boats using a variety of materials, such as aluminum foil, popsicle sticks, styrofoam, cups, corks, etc. Their task was to build a boat that floated and could hold the weight of 20 marbles. The metal pans we used for testing were left over from a catered luncheon and were the perfect size and depth in which to test the boats. Again, the kids worked hard, testing over and over their creations. Some created multiple boats using different materials.