... to the pen, so one pen can read more books.3, Multi language supportFor example, we can use ... and Japanese in one book, It is useful for children to learn languages.4,More interestingBooks can sound, ... is very funny and attractive for children. 5,More interactive learningKids touch the books and hear the sound, they ... many kind of touch game in the sound books, let chilsren to find something in the pages ...