This solar bag is 50 feet long and 3 feet in diameter and can be cut in half to make two bags the same size or two different sizes. The thin, black plastic bag holds over 350 cubic feet of air.
Fill the bag by running, then tie up the ends and let the solar energy of the sun heat the air inside the bag. Tether the bag with string and watch it rise into the sky in only five minutes! This amazing item will teach your students principles of density and buoyancy, as well as solar energy and laws of gases.
The bag comes with detailed instructions and suggestions for classroom activities.