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Push the button on the key-fob and on the car a small hatch pops open and a balloon on a string wafts up to show you where your car is. Push the button again (or enter the vehicle) and the balloon is reeled back in.
Much more useful than the prevalent remote "chirp" which often seems multidirectional
due to the acoustics of a parking garage. Also useful for deaf drivers.
Lost child locator
Similar idea. By me, coincidentally! [wagster, Mar 03 2009]
and another... popular theme [FlyingToaster, Mar 03 2009]
||A happy sad ending. The credits roll. The coats and scarves wrap around hurried bodies. Dozens of balloons suddenly take to the air. Quick, Eddie, get the slingshot!
||+ This would also be useful for finding your friends at a crowded festival.
top hats. § x1