Humphrey's Playful Puppy Problem

Humphrey, the classroom hamster of Room 26, loves spending weekends with his classmates. This week, he is going home with Richie. Humphrey is going to help him with his science experiment (hamsters LOVE-LOVE-LOVE to be helpful).

But Humphrey finds a surprise at Richie’s house. Poppy the puppy is bouncy and barky and is eager to play—a little too eager, Humphrey thinks. Humphrey needs to get out of his cage to help Richie, but can he do that and stay out of Poppy’s way at the same time?