Little J purchased the basic Quadrilla set with some money that Nana and Papa sent. It was a little bit of a rainy weekend, so when S&J went down for a nap on Sunday, he set it up in the kitchen. It comes with a book of several configurations and he patiently sat and put several set ups together. This is a terrific toy in so many ways. He can either follow the diagrams or design his own, he has to move with care in order to not knock it down, and it is amazingly fun to watch the marbles make their path down to the end.