My teammate, Mrs. Timms, had an excellent idea of how to get the students to visualize addition doubles. We use dominoes as manipulatives to teach doubles so she extended this by suggesting we create edible dominoes with graham crackers, white icing, and chocolate chips. We started by adding one chocolate chip on each side to model 1+1= 2. We then added another chocolate chip to each side to model 2+2=4. We continued until we had modeled 9+9=18. Of course, after modeling the doubles, the students ate them! Below are two close-ups of the edible dominoes along with a slideshow of the students making them.