Adventure According To Humphrey by Betty G. Birney
The students in Room 26 are learning about boats and building their own for a race on Potter's Pond. Humphrey the hamster loves dreaming about being a pirate and watching his friends build ships. But when he mistakenly ends up at sea on the day of the boat race, he finds himself in the middle of more adventure than he bargained for! Ages 8-12, 144 pages.