Paint your own circuits with electronic pens.

PhysOrg gives new meaning to “magic marker” with these pens that draw flexible circuits in whatever shape you like:

London-based Bare Conductive Ltd. makes electrically conductive paint called Bare Paint. The substance allows the painting of “liquid wiring” on any surface. Except for skin, you can apply its paint on walls and assorted surfaces to conduct electricity. “Bare Paint” began as a project by the inventors, then students, at the Royal College of Art.

Paper as a vehicle for delivering more information than immediately meets the eye via the painted object—that is what they see as their opportunity. Applications for their paint can easily translate into talking billboards and walls, where objects on surfaces turn interactive. A light switch painted on paper, when touched, can turn on a light, or a touch on a poster object can make a sound.