A neat project hat is lots of fun.
If you make lots you can throw them on buildings and create really cool displays. sorta a graffiti thing, Im not sure if it is illegal to throw them on buildings them on buildings and statues and such, but i think if you don't get caught you will be fine :P. i would suggest just using them for your car or bike. stick em on the wheels of your car or bike at nighttime. they look pretty sweet. You can also use a slingshot to get them up to really high places such as the side of sky scrapers. This is not my own idea, the idea is from www.graffitiresearchlab.com. The video, however is entirely my own work.