Easy to print ghost earrings for Halloween, available in two versions - one with holes for a small ring loop and one as a pendant.
Every Thursday is dedicated to 3D printing at Adafruit, where the DIY 3D printing community showcases their projects integrating electronics and 3D printed enclosures, brackets, and sculptures.
Consider building a 3D project around an Arduino or other microcontroller, printing brackets for mounting Raspberry Pi, and exploring LED projects using 3D modeling.