My three year old daughter loves this book. The book tells how different mammals are born, nursed, grow, eat, etc. It is really fascinating [I found it very interesting myself]. While the book is long and written for a much older audience, it still held my young daughter's attention [though we read only a few pages at a time]. The book is very educational and would be especially nice for families who breastfeed. It ends with the birth of a human mammal and tells how the baby is born and nursed and grows etc. This is a really neat book!