Create some mini lid banjos from a few simple materials
Use 1 dollar glasses, rubber bands, and spray paint to make beautiful candle holders.
Rubber Band Powered Lego Car
...And Then We Set It On Fire: Rubber bands, soak in Soda Ash, rubber band,I did not measure how much dye powder I used for this one, but the colors I used were Aquamarine, Dark Green and Black (all Dharma). When I work with dyepowder, I prefer to cover the powder with a thin layer of snow. This was left to batch till the next morning.