Little Rabbit has looked forward to becoming a big brother, but when Mama brings home triplets, he quickly realizes that babies are not as much fun as he thought they would be.
Bored with her doll and longing for a real baby brother, Annie swaps five of her father's pies for a baby from another dog family and finds out just how much trouble an infant can be.
Froggy hoped for a brother to play with so he is disappointed with his new baby sister, Pollywogilina, but only until she is old enough to start learning from her big brother.
Determined to be a good big sister, Rex starts spending all her time with the baby her family has adopted, making her neighbor Pinky fear that he has lost her friendship.