So far it's mostly been adults who've had the fun of using 3D pens, which is ironic given how drawing in mid-air can release your inner doodling child. However, the 3Doodler Start is a 3D pen from ...

Apple has filed a patent for a stylus that works on any surface, not just touch-sensitive ones, and would allow users to also draw doodles in midair. The patent application describes a pen that can be ...