... -color illustrations The first series preschool audio books for Baby1. This series is suitable for 0-3 years.2. The books with ... 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,P3,P4,P6):1 ...