I want a 3D printed time machine - to make sure the Democratic Party never comes into existence!...oh, and the Banks don’t control everything...that would be nice...
Some have speculated that time machines might be possible, but all involve extreme amounts of mass and energy far, far beyond any current abilities.
In fact, I would postulate that they are far beyond abilities that are speculated for nanotechnology, though nanotechnology could put them on the edge of the doable.