Hamtaro

5th-grader Laura Haruna owns a hamster, and his name is Hamtaro. 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.

(Source: Anime News Network)