The 3Doodler ($75 and up) is a 3D printing device that can be used within minutes, without needing any technical knowledge, software or computers.
The pen uses the same ABS plastic as many printers, but allows you to draw anything you like, in the air or on a surface. As you doodle, the pen extrudes heated plastic, which quickly cools and solidifies into an actual object that you can hold and touch. You’re really only limited by your imagination and your drawing skills.