Graffiti Diplomacy is a Brooklyn-based graffiti art studio and educational outfit with a terrific Web site containing free lessons, handouts, and craft activities for beginning (and advanced) artists. Their "Urban Blight" diorama how-to, complete with popsicle stick picket fences, looks like a lot of fun to build and tag.
Graffiti Crafting # 1 – Learn How To Make A Popsicle Stick Graffiti Picket Fence