National Parks of the U.S.A. Activity Book is a companion to Kate Siber's National Parks of the U.S.A., but is perfectly enjoyable even without reading that informative book first. (Although some readers might be interested in seeking out more information after enjoying the activity book.)
I think this activity book is appropriate for elementary school children. Most of the activities are fairly simple, but some require strong reading skills. I do wish that the book hadn't been printed in cursive, since some schools don't even teach cursive any more and it is an upper-level skill for part of the age range. It might be best for siblings to share, especially since there is a game needing more than one player.
This is a shorter activity book (around 16 activities) and while a few will take longer - a game, designing your own park - most are fairly short. One is also a wildlife spotting activity, which can't really be done most places.
There are several facts included, especially in the true or false activity, but for there isn't much beyond a few tidbits per activity. Once the activities are done, National Parks of the U.S.A. Activity Book doesn't offer much further value.
However, I do still like this activity book because it is gorgeous. It is oversized compared to most, with a pearlized cover. Chris Turnham's art recalls classic travel posters for the national parks. It is showcased in borders, illustrations of animals, and a few human figures of multiple races. The best part of this activity book, to me, is the included fold-out poster and stickers. The poster is a map with little illustrations representing each park, and the stickers feature many plants and animals shown throughout the book. They're beautiful, and I think kids would have fun with both.