We did the one at American History last summer and I thought it was fantastic. We did a scavenger hunt for several hours. Each clue involved an activity and at the end you put them together to solve the mystery. So by the First Ladies exhibit you painted a plate to go with the idea of the China in that room. In the transportation area you made little cars and then raced them. All really well done.
I brought inflatable mattresses, eye mask and ear plugs and slept just fine. It was a little chilly.
We are doing Natural History this summer and hoping it is well done too. Go with a group if you can - makes it more fun for everyone

!