Tuck is an adventurous little boy that never sits still. He likes to play with his dog, Teacup, but what he really wants is a play buddy. Tuck is excited to find out that he and Teacup will be getting a baby brother or sister, but he learns quickly that waiting for his baby to be born and then waiting for the baby to grow big enough to be a play buddy isn't very much fun. Though patience isn't something that seems exciting to Tuck, he realizes that waiting for things isn't too bad.