... the DEMO board(sound sample) according to yours, and send you drawing depends on your design.c, If ... also can make the book according to your design,and we have long-term cooperant printer .so the ... .C, function: there are 6 buttons , one button and one different sound--press a button ,it sounds (frog ... suitable for paper book ,one sound for one page with a picture of relevant contents. Study child to ...