3D Pen

A 3D pen is a handheld device that uses heated plastic filament (often ABS or PLA) to create three-dimensional objects. The pen extrudes the melted filament as you draw, allowing you to “sketch” in the air or on a surface. It works similarly to a hot glue gun, but instead of just gluing things together, it allows you to build shapes and structures in three dimensions. People use 3D pens for art, prototyping, educational purposes, and fun projects.