"big" and "Small"

I happened to have friends visiting from overseas who gave Jasper a few Chinese books as gifts and I casually taught him the Chinese words "Big"(Dai) and "Small"(Siu) and he learnt them within minutes. Also, when he has had enough of something he says it like "bye-bye grapes" or "bye-bye milk / nai nai" then trying to get off the chair.