Princess Penelope is going to be a big sister soon and she wants a little sister, but when her mother brings home a little brother, she learns that he can be just as special.
Molly McCool, finding out that she will be a grandmother for the first time, signs up for classes at Grandma University but doesn't understand when the teacher says the students already know the most important thing of all.
Tells children what to expect at home when a new baby brother or sister arrives, from dealing with dirty diapers and crying to holding the baby and making happy memories.
A small girl's favorite plush toy seems to be responsible for the mischievous "accidents" that begin occurring when a new baby brother joins the household.