The Great Big Book of Families by Mary Hoffman and Ros Asquith

What is a family? Once, it was said to be a father, mother, boy, girl, cat and dog living in a house with a garden. But as times have changed, families have changed too, and now there are almost as many kinds of families as colours of the rainbow - from a mum and dad or single parent to two mums or two dads, from a mixed-race family to children with different mums and dads, to families with a disabled member.
 
This is a fresh, optimistic look through children's eyes at today's wide variety of family life: from homes, food, ways of celebrating, schools and holidays to getting around, jobs and housework, from extended families, languages and hobbies to pets and family trees.