This cute alien is more than what it seems. It's also a test of a modeling technique taking advantage of the properties of 3MF files to contain multiple bodies in them, as well as color information for those bodies. This model is therefore appropriate for single color 3D printing, with the bodies nested next to each other, multi material 3d printing, (like dual extruders, palate, or MMU) if you ungroup the model, and full color 3D printing, if you have a full color 3D printer like a Davinci Color or 3D Systems Projet. In other words, this little model is future proof.
But it's also a cute little alien.
(Ignore the 1mm cube. That was only there to overcome Thingivere's confusion about 3MF being a valid format.)
Made in blender, exported as an OBJ, converted to 3MF by 3D Builder which comes with Windows 10.