1. A method comprising: integrating a first 3D object model with a second 3D object model to generate an integrated 3D printable model, the first 3D object model modeling a first object that is passive, the second 3D object model modeling an electrical power source receptacle that operably connects to an electrical power source that provides electrical power for operation of the first object; and printing a 3D object based upon the integrated 3D printable model.