I wanted for my son to have this book remembering how my nephews loved it. I bought it when he was 13 months old and it has been his favorite ever since. He is 16 months old now and asks for it by saying "bu bu," translated to my ears as "bus book". We look at it every morning for a half hour before breakfast and then for another half hour after naptime. This is about the only time in the day that my son will cuddle with me so I am very grateful for such a wonderful, interactive book. He loves to point to the kitties in the box on the bus and also to the dog that chases the bus. I will keep this tattered first favorite for myself as a fond memory of special times shared by mother and son, even if I buy many more copies in the future once this one earns a much-deserved retirement!!