The Museum of Science and Emerging Technology was quite interesting. They have the usual stuff for kids but also go into a bit of depth. The highlight of the visit, however, was seeing Asimo who is Honda’s robot:

He walks and run, does a few hops and kicks a football. It is quite impressive and a little bit scary in a Terminator kind of way. That said, he is just a robot. Obviously if you hooked him up to Microsoft's AI Chatbot he might start learning how to goose-step or something.