Lola loves guinea pigs, and wishes more than anything that she can take home the classroom guinea pig, Bert. With a little help from her friends and Charlie, she learns all there is to learn about guinea pigs. But caring for a pet is a big responsibility... Is Lola up to the challenge? Charlie and Lola's love of animals continues in the second story, in which they care for their new pet mouse, Nibbles. As they discover, mice are extremely clever and seriously brave; Nibbles, an expert tightrope-walker, is no exception. Join Charlie, Lola and Nibbles as they embark on a heartwarming journey of adventure and friendship.