... . 2, One pen can read more booksIn order to read the books, one book correspond with one computer file. We use 512M ... for children. 5,More interactive learningKids touch the books and hear the sound, they can also follow the sound to speak. It will be ... kind of touch game in the sound books, let chilsren to find something in the pages, compare something, connecting the relative patterns, etc. 7 ...