The Solar Bag

This 50 foot solar bag floats with the power of the sun. Made of ultra-thin black plastic (many times thinner than a plastic trash bag), the Solar Bag holds over 200 cubic feet of air. Simply fill by running, tie off the ends and let the sun's heat do the rest. Within 5 minutes, the enormous bag will rise into the air and create a sight to behold. The most visual way we've found to demonstrate scientific principles such as density and buoyancy. Can be used over and over again.