This book is quite unusual (drawings, format, ...). My son has had his 17-month and joined immediately "Yippee" Rabbit (one of the drawings of the 1st book). It mimics the "thrown back" as soon as it is safe to couch the bottom saying Youpi and raising arms. It makes him laugh a lot. The rest of the story pretty little interest at the moment, learning colors but also it will certainly soon. It is a 5 star just for this wonderful page :-)