If you're irritated by the sticky mess created by your hot glue gun, this hack using a medicine cabinet staple could be just ...

The basic operations of a plastic extruder – pushing a rod of plastic through a heated nozzle – already exists in a hot glue gun available for $3 at WalMart. To build his printer, [Chris] tor ...

We specifically like how he designed the nozzle. By cutting a small hole in the bicycle pump needle, it’s possible to jam the syringe through that hole to provide a basic mixing valve for air ...