"A 100 hundred-year-old tortoise invites her friends to her birthday party. Her friends end up being different types of families: a traditional family, a large family, a single parent family, a blended family, a homoparental family, a divorced family, a family without children and an adoptive family. At the end of the book, they discover that, all together, they form what the hundred-year-old tortoise considers to be her family."