Hamtaro

The Adventures of Hamtaro (とっとこハム太郎, "Tottoko Hamutarō", literally "Trotting Hamtaro") is a children's storybook series by Ritsuko Kawai. The main character is a hamster named Hamtaro. 
Plot Summary.
After moving into a new town, Hamtaro finds that he's in the company of lots of different hamsters, making up a group of hamster friends that go on crazy adventures through the city. Before they save Laura and other humans from nasty predicaments, however, they have to learn how to save themselves.