Sound book is one kind of board book, is a premium product of board book, there is a additional sound module in the book, the sound module have to be put in the die cutting hole and pasted to the board book by hand. There is a button to open / close the sound generator.
Each page there are sound type button to open the book sound.
Interactive sound storybooks and novelty books pair favorite licensed characters with exciting audio, from sound effects and sing-along songs to books that read aloud. Includes Play-a-Sound Books,Music and singing support reading readiness Connecting sounds, words, and pictures builds vocabulary Sharing books with your little one strengthens your bond,