He's got everything in his lab. He's got a million bucks, he's got all sorts of toys, he's got a car... if he's seen it, or can imagine it, he's got it.
To further the delights of his imagination, I requested that Edmund's Scientific send their catalog. He gets to look at that and see the things he wants for his lab. He's very clear on the idea that he gets everything he wants in his lab, and that's not the case in the outside world. So, when I tell him that he can look at that for stuff he wants for his lab, he knows that it may or may not happen in the real world, but we still want him to be having fun with the stuff.