Bloxels

Print out cubes of different colors and the base grid out of black and download the app to play.

[I am not related to the company in any way I just wanted to see how well their app worked]

The grid they provide is 26x26x1.27cm but mine is 8.3x8.3x0.4 to print on a wider range or printer but still seems to work fine. Filament color variations and lighting configurations do confuse the app though.