1Material are safety 2.Install the sound module inside the book 3.Funny way to learn * Made for kids by 0-8 years old.* In English and Chinese.* 5 in 1 design, inclusive of animals, fruits & vegetables, vihecles, English alphabets & Numbers and Chinese Pinying.* one sound box with one substrate, paper charts removable,exchange paper chart to learn different content*chart size: 428*588mm * Made ...