I used Twinkies and vanilla wafer coookies, a little frosting, powdered sugar, , plastic Easter eggs, foil, a blue permanent marker and toothpicks.
Step 1: Step One
First, I put a little frosting where I wanted the cookies to attach to the Twinkies, then I placed the cookies and poked a toothpick through all three pieces (cookie, Twinkie, cookie). It helped to turn the grouping sideways to push through the toothpick. I'm sure someone could come up with a better group of pieces. The cookies had a tendency to spin on the toothpicks.
Step 2: Step Two
I had a flat bowl filled with powdered sugar that I put the R2D2 into, and used a spoon to coat them. I found it best to hold them at the toothpick points to keep them together.
Step 3: Step Three
I used 1/2 of a plastic Easter egg, which I covered with aluminum foil and then used a blue permanent marker to draw R2s 'face' to put on top of each Twinkie. Not the healthiest treat, but very eye-catching! Good luck!