There are 3D-printing pens that let prolific doodlers turn their drawings into three-dimensional sculptures, but all users are really left with is a piece of art. Polaroid’s taking 3D-printing pens ...

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 ...

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