For my full feature and tutorial, go to eighteen 25.
Start with a piece of particle board cut to 31x24. This was less than $7 at the hardware store. Because the overall look is very simple, I decided to cover the board with fabric to add more texture to the piece. (I wanted to cover it in burlap, but thought it would blend into my paint color. The possibilities are endless here!) I then attached my three spray-painted license plates with nickel furniture nails (less than $2).