This Pen 3-D Prints Live Cells On A Damaged Bone | A new "bio pen" will allow surgeons to "draw" layers of cells on damaged bones and cartilage during surgery. This will help cells multiply and heal the injured spot by growing into nerves, muscle, and bone.
Add dimension to your drawings—literally—with a 3D printing pen. As you draw, a built-in UV light cures the ink, letting you build almost immediately. The ink is cool (not hot like other 3D pens), so it is safer for kids to use.