I was reading Confessions of a Homeschooler the other day and sumbled across her PreK Letter D post.
She has quite a few ideas for various letters of the alphabet to supplement your lessons, InshaALLAH.
You can see that the children were responsive to the different activities and the two year old even sat still long enough to participate!
Later on, the excitement of the day got to them and I found them slumbering, lol.