To make the dough: in medium bowl, add the roll of cookie dough with a little bit of flour. I don't measure it but add just enough so that I can roll it out. Add red food coloring. Kneed together.
Flour your cutting board so it the dough doesn't stick. Roll it out with a rolling pin or just have the children flatten it with their hands. Sometimes they like this better. Use your circle cookie cutter and cut out several circles. Cut each in half.
Place on your baking sheet. Add mini chocolate chips. We probably use more than a watermelon has, but we love these chips. LOL
Bake according the the directions on package. (usually it is in a preheated 35o degree oven for 12 or so minutes)
While they are baking you can start the icing. I use a pretty shallow bowl like an oval vegetable bowl. Add confectioners sugar with a few teaspoons of water. Add your green food coloring. Stir. It should not be runny, but not thick like you would spread it either. You should play with the measurements, the kids will like to stir it anyway.
Let the cookies cool completely on cooling racks. After they cool, while holding the straight side of the cookie, roll the other end in the icing (see picture). This should end up looking like the rind of a watermelon. Place on wax paper to dry. After they dry, store in air-tight container lined with wax paper.