When I was in second grade, my friends and I loved to ride bikes around town. We also liked to do things that we know people would look at in confusion. So we decided to attach smoke bombs to the spokes of our bikes. First we would buy colored smoke bombs at the closest liquor store, then we would put about 3 bombs in the front and back spokes. We would light them, then ride through a populated area, such as a park. The smoke might color your spokes the color of the bomb, but its not that big of a problem. Go bike around with the smoke bombs for a while and give me some feedback and make some videos.
P.S. Try strapping some to a skateboard and go to the local skate park with it, its fun.