Yes, it's the mindstorm NXT or something like that and he is an adult (according to the law ) . I just went and checked it again on Amazon and it is $25 cheaper now. I ordered it less than a week ago. I emailed them asking if they offer price guarantees.
I bought a set of them for my oldest back we he was about 11 and we had a ball with them. He's now 18 and he still pulls them out to see what kind of stuff he can make them do. They're a great way to introduce some level of programming, logic and robotics while having fun. If you have a friend with another set you can do Lego 'Battle Bots'.
Turns out some of the local high schools use them in their computer classes.