knock knock....who's there?

So after the little uh-oh incident we decide we needed to set up some ground rules for the kids. We made the kids all knock before coming in the house. This seemed to be a bit of a foreign concept for some. I'm sure because most of them live with family around and so knocking seems unnessesary but most of the kids caught on quickly. For others all it took was a few fasies and they got the idea. One boy in particular had a hard time but he is the cuttest and chubbiest of them all (I love the chubby ones!) so I tended to be more forgiving with him. But I knew I was getting through to him when after he came in he went over to the fridge door, knocked, and in broken English said, "can I come in?"