My favorite christmass present that I ever got was this year when I got a robotics kit. It has the same things that we use in our robotics class at school. You have something called the NXT that controlls the whole robot and then you also have different sensors and peices that you can put on to build your robot. Once you build it you can even program what you want it to do on the computer. I have made all kinds of robots and you would be amazed at how many different possibilities there are. With all the possibilities it is always interesting to see what the final robot looks like.