"When I first saw this set at wal-mart, I knew that I had to have it (not to sound greedy or anything, I just thought it was awesome!). So when I finally got it started building it just like any other set but it started to be a little more challenging then I it would be. It might not be very obvious on the box, but the spider crawler is like a machine! If you push it along a lat surface, it starts to move it's 8 legs in the same way a real spider would! In conclusion, It is an absolute must have for any Lego or Spider-man fan alike and no questions asked it is a full 5 out of five star set!"