$1 DIY Conductive Ink and Paint (Non Toxic, homemade, cheap!) - Makerboat.c
Turn fire into conductive ink and paint, then build electronic circuits, paper musical instruments and inputs for your Arduino boards!
Today you will learn how to make your own conductive ink to draw electronic circuits using the leftovers from your fireplace or BBQ! You can use this ink to draw circuits on paper and cardboard, learn about electronic circuits or play around with arduino boards like the Makey Makey to create paper musical instruments like pianos, digital drumsets, guitars, etc.