Mt ds is nearly 9 months, and this week I've been saying 'No' to him if he's touching something he shouldn't, i.e., dvd player.
I don't shout or even say it in a loud voice, but it is firm. He looks at me and then the bottom lip goes and he starts to cry and I feel so awful. But he does stop doing it, and I'm pretty sure he understands the word 'no'.
But my heart breaks, so should I keep going with this, or should I wait until he's older and just remove him from the t.v./dvd player when he's touching it?