... . This kind of new technology is OID. The pen has a optical sensor in its head, and the book has been ... ,1B) 90PP(2A,2B,3A,3B) Package: 6 books in a gift box with 6 CD. English is the most professional ... in English.Every units include:An interactive story in English,a foreign song, a cartoon sticker, 5 pieces of interactive games in English ...