You may already be a member – click here to find out.
Vous êtes peut-être déjà membre – cliquez ici pour le savoir.
Steve Spangler’s Airmazing Solar Bag

Steve Spangler’s Airmazing Solar Bag

By Steve Spangler. A Solar Bag is a long plastic bag made from a very thin plastic and colored black to absorb solar energy. The heated air inside the bag provides buoyancy and causes the bag to float. Over the years, it’s become a very popular science demo for...
(noscript)