It’s not even funny, how badly I want this to be a real thing.
http://www.thinkgeek.com/product/f483/?pfm=AprilFools_rightcolumn_NewStuffFTW_1
Of course, even if it was a real thing, I don’t have a car to stick it on. Still. Curse you, April Fool’s Day! You keep offering me shiny things and then laugh as you take them away!