Picture a tiny object consisting of a speaker, a button-cell battery, and an adhesive side. Every now and then it makes a noise like a cell phone ringtone.

Simply buy a bag of 100 of these and stick them under seats in the movies, on buses, in bridge clubs: anywhere you'd like to see some excitement. This will drive people up the wall, as some of them start to accuse others, some respond helplessly that it isn't their phone, and others dig frantically through their bags to find the phone they think is ringing that they've actually already turned off hours ago.
-- phundug, Mar 09 2006

toy cell phones are baked http://toywonders.n...%26OVMTC%3Dstandard
costs about $1 USD each if you buy 144 [xandram, Mar 09 2006]

Might be worth giving this a go in a library.

Mmmwwahaha +
-- skinflaps, Mar 09 2006


P.S. Throw one into someone's bag when they aren't looking. Then follow them around and watch.
-- phundug, Mar 09 2006


Add a record feature to adapt this to people's actual ring tones.
-- jutta, Mar 09 2006


Another optional feature: when I was in college, one of my friends was plagued by a device that had been rigged to only make noises when the light was turned out, making it next to impossible to find once it was hidden in her room.
-- DrCurry, Mar 09 2006



random, halfbakery