Pat Hutchin's "Titch," first published in 1971, tells of poor little Titch, who has a sister Mary, who was a bit bigger, and a brother Peter, who was a lot bigger. It seems everything his big brother and sister have is always bigger and better than what Twitch has to play with each day. But then one day Titch discovers that something little can grow very big indeed.
If you have a family like I do, where there is a boy, a girl and a baby, then "Titch" is a nice way of letting your youngest know that being the youngest does not always mean that you have the least important role to play. Hutchins tells his story with an economy that will make an impression on any young child old enough to recognize that being the youngest is not a lot of fun sometimes. Even better, Hutchins has a series of books devoted to Titch, which means that once you child is hooked on the character, there are more books for them to read.