Meet the Gakken: a mechanical hand that can write the Japanese character for ‘A’, a peace sign or the name ‘Tosa’ automatically. It has 3 plates that rotate and get caught by two sliders that then pull the hand to draw these shapes. You just have to stick a pen into its holder to get started. The device runs on a AA battery. What the Gakken can write is limited, but there is an online app for you to design your own plates.
This geeky toy sets you back $44.95 at the time of this writing.