More to explore:
Circuit Stickers | Crowd Supply
Circuit Stickers from chibitronics (June 2014)
Circuit Scribe: Draw Circuits Instantly | Crowd Supply. Another cool idea
circuit scribe: draw circuits instantly with conductive ink pen
Circuit Stickers from Jie Qi and Andrew Huang. Paper computing made fun and SIMPLE! (7 june 2013) hlt.media.mit.edu/ woot!