The paper is indeed very thin for children under 2 years old and the buttons are impossible to be pressed by a child under 2 years old. Sometimes I struggle with it too! It requires strength and precision from the finger. The switches are all on the last page and the force needs to go through all the pages; as a product design, it's terrible!

The pages are made of paper, so it cannot be used by small babies because they will tear it. It is suitable for ages 3 and up

Nice music books with clear sounds, pleasant for the first contact with music for preschool children.

The Renault at the opera had more interest. I found the sounds and the illustration repetitive.