Circuit Scribe is a gel-pen that draws with conductive silver ink. It makes building circuits as easy as doodling. You can build a circuit with nothing but a coin battery, paper clip, and LED, or build out complex circuits (see video for more). Electroninks, the company behind Circuit Scribe, is running a Kickstarter to fund the project. They've exceeded their goal by $200,000 and are using the extra funds to build an educational platform for the STEM Education & Maker communities.