There seems to be this particular universal law – whenever you have just washed your car, it will begin to rain – and also, should you happen to park under a tree, a bird will poop on your ride at least once. I would like to add that such a ‘law’ will have a higher chance of probability whenever your car is polished, too. Why not play a prank on your friend’s brand new ride with the $3.99 Bird Poop Stickers? Application of this sticker is simple, and it works best on a freshly washed car in order for you to check out his or her frustration. There are 5 realistic bird poop stickers of various sizes to play around with.