My infant son is fascinated by pop-up books and I've always loved them since I was a child. I am a civil engineer, and I was really looking forward to using this book to introduce my son to the construction industry. The book was pretty [$$$], but I figured it would be worth it. Wrong! The pop-ups are very elaborate and when we got to the last page where the city is supposed to pop up, the buildings tore off the page. I tried to tape them back in, but no luck. I guess this book will have some use - it can teach my son about poor engineering design.