On Kickstarter I found a nice project. The Polyes Q1 3D pen! Polyes is the first 3D printing pen with blue light and real inks.
Using this pen you can draw objects in 3D space. The ink is hardened using an UV or Blue led light. They offer all kind of inks, from colored inks to glow in the dark inks.
Because this 3D pen uses light instead of heat, the pen is more safe than 3D pens which extrude plastics and melt it using heat.
Looking forward to receive mine in a couple of months!