The friendship between a young girl named Millie and her pet rat Cupcake is one of a kind, strengthened more when Cupcake has babies. However, in the new children's book by author Mildred Potash, Cupcake's Babies, Millie's mom tells her she needs to find new homes for Cupcake's babies. Millie decides to give the rats to her friends as pets; however some aren't sure of a pet rat and others have dangers for rats, like cats, in their homes. To make matters worse, Millie also has to deal with a boy named Billy who says rats are dirty. Having raised the rats herself, Millie knows about caring for a rat and looks for ways to encourage her friends to see the fun of having a rat. Cupcake's Babies is an endearing story about the importance of choosing the right pet and the benefits of a human and animal relationship.