Mind-Boggling Machines and Amazing Mazes

My 3 yo loves reviewing each machine and asks me to explain the intricate mechanisms and miscellaneous contraptions.I would guess that older kids will enjoy too since the detail and complexity are significant. Dad likes reading it with the little one due to the real challenge.Can be frustrating at times since pipes, rails, chutes, etc. cross over middle binding of book requiring a close look and a firm press on the center of the book to correctly follow the lead from one page to the other and back.If you can find a copy and have a 3 to ? year old, then I strongly recommend you buy it.