Lovely pic, the one with the cat!!
I think that one can teach Dharma without giving the name of things. I am a teacher with small children and they are from Catholic Church (as usual in Portugal) and i teac them some Dharma, without using any specific words. In fact, i teach them some moral precepts like not kill, even a spider or a fly. If i see a kid trying to kill bug i will stop him from doing that and explain to him that if he/she (the child) was a bug, he wouldnt like to be killed by a human.
Sometimes i will practice some simple form of meditation with them.
Sometimes i will tell them that they must be very aware of their acts...sometimes a small discussion with a friend can end up in a very bad fight with very bad injuries.
Small things like that.
I dont have a child yet but when i have i still not sure how to teach him. Probably with small things like i said.