"Julius is the baby of the world," say his parents. Lilly, his older sister, thinks Julius is a disgusting germ. Her mind is made up until her cousin Garland says a thing or two, and Lilly has a change of heart.

Through a misunderstanding, Junie B. thinks that her new baby brother is really a baby monkey, and her report of this news creates excitement and trouble in her kindergarten class.

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.

The Bunn family gets a new baby and learns how to take care of it.

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.

Bad kitty is not pleased when a baby joins her family. Includes fun facts and tips for training a cat to perform tricks.

An all-knowing big sister gives her baby sibling lessons in being a baby.

Having found a tiny baby in a peanut shell, Larky Mavis calls him Heart's Delight and carries him around as he grows bigger, to the confusion and anger of the adults around her.

A dog, a cat, a duck, and a cow try to think of things to do to soothe a crying baby.

Only when faced with a dire emergency does Pig Pig finally react like a grown-up and admit he is not a baby any more.