http://www.drugpolicy.org/marijuanasticker/
"Making marijuana legal is a hot topic nationwide. Keep the conversation going by displaying a "Make Marijuana Legal" sticker! Sign up to receive one free sticker from the Drug Policy Alliance Network, and help build the movement to end prohibition. You get 1 free. Want to really get the word out? Buy 5 or 50 stickers to give to friends and family. For $5 we'll send you 5 stickers, or for $25 we'll send 50 stickers."