Alka-Seltzer Rocket

Dan sent in this fun how-to on Steve Spangler Science on building an Alka-Seltzer rocket – “What happens when you have a build-up of gas? Don’t answer that question! The gas in question is carbon dioxide and the explosion is nothing short of fun. Warning: It’s impossible to do this activity just once. It is addicting and habit-forming. Proceed at your own risk!” – Link.