Replace an empty pen from your kit, or use the pen with your own electrical components. Use it on any surface a rollerball pen will write on. The idea for Circuit Scribe was born out of conductive ink research. The inspiration behind putting the ink into a roller ball pen stemmed from the passion for exploring ways to seamlessly integrate electronics with everyday materials. The goal of Circuit Scribe is to make circuitry accessible to all. We encourage users to take the laws of electricity they learn and turn them into something functional and beautiful.