These pop-up books are not just for kids. They are beautifully illustrated works of art and you can't beat the Amazon price - Barnes and Noble wanted over 120 for this set. My 5 year old checked Megabeasts out of the library and could not get enough of it, he didn't want to bring it back. He asked for it every week until the holidays which is odd for him - most things he "has to have" are forgotten in a few days, with this he asked over and over for months.
It is definitely worth it to buy the set - all 3 books are beautiful and come in a box with a small drawer in the bottom with 3 stand-alone creatures which was a nice surprise. My son and I love to look at these together and he has learned so much about prehistoric creatures. Everyone that has seen them has loved them and wanted a set of their own. The price is more than reasonable for what you get. These are books that he will read to his children as they are worth keeping and treasuring for years.
I would recommend this to people of all ages.