For the past 2 months to our local 2600 meeting, I have brought makings for putting together some Throwies (as made famous by Graffiti Research Labs). This month I wanted to get people into thinking outside the box when making the throwies, I brought some blinking led's some 3v buzzers, resisters various voltage leds, and then makings for about 200+ normal throwies. (lots of variations, including Thuddies, and Meepies got made, but the one I did was called a Snaggie.
I live in New Mexico, most of our buildings are made out of Stucco or Adobe, or frame and board. So I was afraid we would run out of good ferris surfaces to "throwie"
Also figuring we would run out of magnets I stopped by the store for some fishing line, and hence the "snaggie" was invented, they work quite well on trees during the winter.
A snaggie is just an LED a battery a loop of fishing line and some tape (these are cheaper to make than throwies due to the lack of a magnet)