The Lawrence Hall of Science is a hands-on science museum in the Berkeley, California hills, just above the campus of the University of California, Berkeley. [Just a cultural note - I call it the "University of California, Berkeley" because I graduated from the University of California, San Diego. Folks in Berkeley prefer to call their campus "The University of California" period and then tack on a location for other campuses. Those of us from other campuses prefer a more egalitarian naming approach :) ]
Their innovation exhibit is pretty large and is called "Design Quest."
The most popular activity when I was there is the '10,000 planks' area where folks can just build whatever suits their fancy from a whole lot of small pieces of wood. There are some creative examples on exhibit apparently produced by staff and in display cases for inspiration. I think it would be kind of nice to have a way to post photos of folks' work as well.
Here's one young person at work -
The Hall is a beautiful building in a spectacular location with a view of all of San Francisco bay. They have a very interesting exhibit on earthquakes (no surprise there, I guess!). Definitely worth a visit.