If you want a baby in the future, you might just be able to print one.

We’re moving beyond using 3D printers for toys and guns, and onto organs. Medical professionals have started to successfully design, print and implant functional human body parts, and they’re just as cool and creepy as you’d imagine. They’re making ears, eyes, bones, and even skin with the same tech we used to print out book reports.

When it does get to printing out full humans, Elon Musk will run out of ink real fast.