Not a boring textbook, this would be fun to work through during the Summer months or to use as an intro to grammar during the school year. It's short and sweet and cute. The illustrations are funny, and the example sentences stand out enough to make each concept memorable. It was just what I was looking for after administering the end of the year standardized test that showed me a few gaps in punctuation knowledge. Kids that know grammar will enjoy reading this as well as kids who may not have it down pat just yet.
I read a DRC in exchange for an honest review; we have it on hold at the library now because I want to read through it in detail one more time.