Kermit Theeeee Frog here
We took a little sock puppet making lesson and the kids had a blast playing with them.

they had a stage set up where you could do some puppetry of your own and rock out to puppety music.
The exhibit had some articles from The Dark Crystal and Fraggle Rock as well. There were some cool experimental movies that Jim Henson made a a young beatnick as well. It was pretty cool.