You have to wonder why a tape dispenser would be radioactive, and [Wheeler] has the explanation. When you pull tape from the dispenser, you don’t want the dispenser to slide around the desk, so ...

The small 3D-printed “tape reels” can double as dispensers, and stack nicely onto each other thanks to the sockets for magnets.

“They both use the same drive mechanism, which is an auger that pushes the candy out,” Reed said. “So that, 3D printing and then lots of duct tape, a little bit of welding and then I build ...