This book has always been a favorite in our household with our two daughters (now ages 3 and 6). They both grew up with this book and it made for a great introduction to numbers and counting. The book consists of little plastic monkey faces showing through holes in each page. As you turn each page, one face stays back on the previous page so that the count of monkeys goes down. The story flows with the decrease in monkey faces as they monkeys do something silly that they aren't supposed to do and fall off the bed... until there are none left. My 3 year old still chooses this book pretty regularly for her bedtime story even though she already knows her counting. She thinks it's a funny story and we regularly tell them to "stop messing around on the beds so they don't fall off and bump their heads." It is a great introduction to counting for your little ones. Highly Recommended!