I popped open the box and spread everything out on the living room floor. Ilana, age 9, went right for the guide booklets. She lined up all the pieces and methodically figured out how they could go together. Kalea, age 5, soon joined in, but she jumped in with trial-and-error. Within a couple of minutes, both girls had built something. For my part, I was pleased with the well-organized guide booklets and challenge cards, as well as the well-made parts. Lots of possibilities.