Teach your kid the color theory with the Diskiness. You can create countless shades by rotating its 12 paper discs. It features a suction cup allowing easy fix to windows or LED lamps. Depending on the discs’ shapes, the color wheel is available in three options: oval, round, and triangle. The gadget is a collaboration between two Swiss companies, Heimstätten Wil and Tät-Tat, and it’s designed by Brigitta and Benedikt Martig-Imhof.