A woman I went to boarding school with in Guatemala told me how she made Transformer cookies with her sons, and what a success it was. She just used a gingerbread man cookie cutter and squared off the head, arms, and feet. I thought that was a great idea, so we made them.
My oldest son Bryan actually sculpted a more complicated Transformer with a metal spatula while the dough was still on the counter. Then we iced the cookies with icing. I was able to get such bright bold primary colors from icing dye made for professionals who decorate cakes for a living. You can buy the icing dye from craft supply stores that have a cake-decorating aisle.
We added more details with black icing gel, which you can get at a regular grocery store. You could also add M+M’s and other candy for the buttons of each robot. The finished Transformer cookies looked good enough to eat!