Bare Conductive Paint Pen: Electric paint. Nontoxic, solvent free and water soluble. You, your child can use it to draw circuits, solder components even do repairs. The pen creates a "liquid wire" that will conduct electricity from your power source to a circuit. Works on traditional electronics, plastic, paper, cardboard even textiles and is compatible with conductive thread, PCBs & microcontrollers such as Arduino, Raspberry Pi and FLORA. Conductive when dry. Comes off with soap and water.