for learning English, I play cartoons on my tablets for DS everyday eg. peppa pig, alphablocks. and of course sometimes reading picture books with him on pad or mobile phone. this helped a lot in his English level. But my parents do all the way against me because they alleged that kids watching tablets/mobile do harm to their eyes, as a majority of (grand)parents in China thought about. maybe it's right to some extent, but I never heard any European/American family limit their kids playing tablets, and the reason which Chinese family worried about seems not an issue for them. maybe I don't know western family. now I limit DS's cartoon time in 0.5hour/day, and it's really not enough for him. please let me know how u consider and handle this issue. won't you worry about DC's eyesight?