My kids LOVE Captain Underpants. They're incredibly silly (the books, not my kids ;p ) wait... what am I saying... ha ha ha

Anyway, they'll read several per day (they're about 150 pages, something like that). My daughter also loved and read the Magic Kitten series, which is rated for ages 5-8, I believe, but they're chapter books.

(My kids LOVE Goosebumps smile )