Made this for a dear friend's son, (like a nephew) I had 6 days notice and a big cake due the previous day. So I didn't get to put in the time or effort that I would have liked. As I was working on it, my son, the computer and electronics geek, said that he could build a light for it. He had all the parts, even a little tiny switch. So I worked on the cake and he worked on the light, all evening. After it was all done and I was lying in bed, I thought of a way to make it "Bigger on the inside than it is on the outside". sigh..... maybe next time.