... 3. Story,English,MP3,Games,etc 4. OEM 5. 32 pages per book Preschool Sound Book This set of ... withe e pen. Talking pen for the sound books "Preschool Sound Book " The reading pen is a popular ... attention of the child. We have prepared a lot of sound books, for example , Mathematic , English learning, Classic ... own voice to compare with the builtin standerd sound, it is very useful for children to learn ...