I have these awesome Do A Dot's and have never thought to do this with my kiddos. They normally just love use them as a free art. Kate's reasoning made alot of sense to me so I decided we'd give it a try when we had a free moment.
This evening while I was cooking dinner the kiddos needed something to do so I gave them each a piece of paper with the letter Ll on it and a Bingo Dobber (as we call them).