3D Scanner
If they do any 3D modeling or already have a 3D printer, then a 3D scanner is the obvious gift they need. Any small object can be scanned and rendered as a digital 3D textured mesh in full color, ready to be printed. This is the closest thing we’ve got to the Replicator technology we’ve all seen on Star Trek, so in a sense you’ll be preparing them for the future for the future, when we’ll be able to print the entire world and everything in it, like real living friends, pets, and loved ones that act exactly as we’d like them to.