Really Creative Educational Products

I just spent the last two days at TCEA (Texas Computer Education Association). Whenever I go to these kinds of shows, I love to walk the exhibit booth. Today, I came across the company RM. They have some really cool electronic tools, including a digital camera/video camera in the form of a laser gun and a little car that moves to physically show the steps of a math problem. I'm wondering what other really cool electronic gadgets teachers have seen?

(Incidentally, I went to look at RM's website - an incredible disappointment for a company with such neat tools.)