We all made them on our last trip (10 yr old, 31 yr old, 52 yr old and 57 yr old). They are very cute but really if you didn't know that it was there you can't see the build a robot part from the outside. The first thing you see are the computers with the quizzes about plastic and its composition (chemicals) and then there is the race (which was fun even for an adult!) and then behind a partition from the "street" you walk through innoventions on. They have instructions on the wall how to put the robots together - my advice is after the race, hang off to the side for a minute because it is a mad house while everyone scrambles to grab parts, once people have moved over to the few tables, it is easier to get the parts you want.