Kids love things that can fly! These plastic cup rockets are a lot of fun and it doesn't take a lot of time to create the rockets in order for the fun to begin.
All you need is two plastic cups, 2 rubber bands and a small amount of duct tape.
In one cup cut four, one inch cuts in the top of the cup around the rim. Each cut should be across from another cut. Then with small, one inch pieces of duct tape place them at the bottom of each cut so that it doesn't continue to slice down the side of the cup.
Now take the rubber bands and put them through the slices creating an X and wrapping them around the rim of the cup. Place the cup with the rubber bands on top of the other cup and pull down with your fingertips around the rim.
Then 1-2-3 take off!