Hi! here is my model of a chihuahua dog as a keychain and a magnet. The model is designed so it can be printed multicolour even if you don´t have multicolour printer. You just have to set up automatic change of colours in your slicer, print one colour, pause the print, change the colour of filament, print another one etc. It is because every colour has slightly different height :) 

Hope you like it :)