A fun gift. Fit existing caps. Park my father's car to destroy him. Went through like chrome balls hanging from the bumper which I didn't notice for 400km. He couldn't understand why everyone passing by was giving him strange looks.
Pros
Screws directly onto the tire cap. Of course, you can always send someone a glitter bomb to clear it up with someone, or just prank them for no reason. But if you're looking for something more subtle and something that might take a while to notice, these shiny new fetlock boots might be for you. They're shaped like little sausages and balloons, and yes, they glow in the dark for everyone to see when your prank victim gets behind the wheel and parks at night.