On August 11, 2013 the Aspen Science Festival - Science Street Fair was held in Paepcke Park. It was a non-stop program of interactive exhibits, experiments, games, and shows designed to entertain and inspire. On Stage Dr. Kaboom catapulted bananas into the open months of kids selected from the audience while Mr. Freeze explored the strange world of cryogenics. There we eighteen exhibits that cover all areas of science. You could watch your brain waves or pull DNA strands from strawberry. Others powered electrical device by riding a bike or explored the erosion cased by water as it ran down mountain slopes. Some participants had the opportunity to explore the law of mechanics and electricity and some participants made lava lamp. There was even the opportunity to learn about relativity and gravity waves.