Check out these fantastic models by Opcion3D. He used the STEMFIE construction set to make a Stormtrooper and a Terminator. You can download the files from it from his Printables account.
The sockets in the STEMFIEtrooper's face can be painted using a black sharpie pen. Alternatively, you can download this remix add-on to print them using black filament.
This toy is unsuitable for children under three years due to choking hazards! 
