Homing device for pacifiers

As any parent of an infant can tell you, pacifiers have this mysterious way of vanishing without a trace. From the flinging of said item in public places to the baffling 'But he had it a minute ago!' disappearences, pacifiers leave our world with alarming regularity.

Considering the price of a single pacifier (about $3.00) I suspect that the pacifer companies are either stealing pacifiers, washing them off and reselling them (the paranoid approach) or are well aware of the life expectancy of the average pacifier and are capitalizing upon it.

To that end, I would propose outfitting each pacifier sold with a small radio transmitter that would allow parents to code it to their frequesncy, and then offer a small hand held device that would allow parents to hone in on the signal of the errant pacifier and follow the signal back down the supermarket aisles to find the missing item where it had been carefully positioned, right between the DCON mouse poison and the WD-40.

Another posibility is to utilize already existing technology and put an alarm on the pacifier that responds to a loud clap so that parents can look as silly as possible wandering around and clapping ther hands together loudly for no discernable reason.