The Lawrence Hall of Science on the campus of the University of California at Berkeley was our destination today. (That, and a trip to the North Face Outlet to get a new rain jacket. And lunch at Jimmy Beans - definitely try the Rocky Jr. Chicken!)
The current LHS exhibit is "Circus! Science Under The Big Top", which was originally developed by the Ottawa Science Museum. Unfortunately, this exhibit is closing on September 2, so you should get there if you can (and I don't guarantee the link will still work). It was very fascinating to see the scientific fact behind many circus tricks - how acrobats' routines affect their bodies, the reasons behind balance, the measurements required to get a human cannonball safely into the net. Children can actually try bungee jumping and tightrope walking in very safe simulations.
And different varieties of circus animals' feces. (I think they were really painted wood replicas and not the real things. So happens I read "Everybody Poops" this morning. Apparently it's a very popular book.)
The new exhibit taking over from "Circus" will be "Wild Music: The Sounds & Songs Of Life", beginning on October 6.