Book 2 in the Sweet Valley Kids series has Jess and Liz taking the class hamster Tinkerbell home with them over winter break. Jess thinks he looks like a rat and doesn‘t want anything to do with him. Saint Liz is the model pet owner, naturally. Chaos ensues when Jess accidentally leaves the cage open and they buy a new one to try to pass it off as Tinkerbell. All is well when they find Tink a few weeks later, so now the class has 2 hamsters. 🐹