It’s easy to doodle a circuit! Made with silver conductive nanoparticles, the ink in the AgIC Circuit Marker can conduct electricity, as shown in this pop-up book inspired Japanese commercial by Kandenko. Watch the LEDs light up as the pre-cut glossy photo paper is drawn on and then folded into place.
Though it’s become popular, you may be able to find the pen and special paper set on Amazon.
via Rocket News 24.