Grab your teacher ID (it gives you free admission) and go see the Jim Henson exhibit at the Museum of the Moving Image. The only down side is the Muppet of Bloomberg in the lobby--no photos in the exhibit.
I thought the exhibit would be more kid oriented but wasn't disappointed. I learned tons of stuff about the genius of this man and saw many of the things he did that go way beyond his puppets. And, if I was still going to be teaching, I would try to find a way to use his story boards as a way to solve math problems.