... first series books for Baby 1. This series is suitable for 0-3 years.2. The books with bilingual audio including:Foods, Life ... the child. We have prepared a lot of sound books, for example , Mathematic , English learning, Classic Fairy Tales , Chinese learning , game ... compare with the builtin standerd sound, it is very useful for children to learn language. specification(P1,P2,P3,P4):1 ...