3D pens are an easy way to introduce the concept of 3D printing. Less expensive and more portable than a 3D printer, they still function on the same principle of extruding melted plastic filament through a nozzle. With 3D pens, users are able to manipulate and build filament layers by hand which makes them very adaptable for tracing line drawings, creating frameworks for 3D objects, doodling, and experimenting with drawing in three dimensions.
When used to create accessible materials, 3D pens can add raised lines and details to illustrations or diagrams as shown here:
3D pens are also used to create tactile enhancements to accompany books or other educational materials through the creation of models and shapes that include additional texture and silhouettes. Colored filaments also allow for high contrast coloring and adaptations for different visual impairments. Examples of tactile enhancements to learning materials are shown here:
Watch tutorials on 3D pen basics:
How to Make a Tactile Book
Basics for Using 3D Pens