This board book describes what little sisters can be, ranging from sticky to cuddly to bitey to your best friend. It would be most appropriate for ages 2 to 4 as the amount of text is enough to tell the story, but not so much that toddlers would become bored and they will also enjoy the images of other kids and babies. The adorable, full color illustrations feature various pairs of siblings or images of a little sister in each of the situations mentioned. This book would be a perfect way to introduce the idea of having a little sister to a toddler or to convince a reluctant big sibling that having a baby sister can be fun. There is also a Little Brothers Are… companion book. ( )