... of new technology is OID. The pen has a optical sensor in its head, and the book ... ,More interestingBooks can sound, It is very funny and attractive for children. 5,More interactive learningKids touch the books ... 2A,2B,3A,3B) Package: 6 books in a gift box with 6 CD.English is the most ... Every units include:An interactive story in English,a foreign song, a cartoon sticker, 5 pieces of interactive games ...