3D PENS--These pens are similar in design to glue guns, but instead of glue sticks, 3D pens melt plastic filament. The melted filament is pushed out the nozzle and the user is able to direct exactly where it goes. In addition to making art projects, you can also use the pen to create jewelry, make custom items like coasters and bookends, and fix household items like a broken pair of scissors.