Print a light bulb. It has a slot on the inside to place a CR2032 coin cell battery and led. The bulb simply slides over the thread and is friction fit. Print the bulb in vase mode.
Check out more of my work at https://www.youtube.com/desktopmakes
Vladimir Mariano is the instructor of the online course 3D Designing for 3D Printing with Fusion 360. Access the course by visiting desktopmakes.com. Vladimir is cofounder and president of the Fairfield County Makers’ Guild, an independent makerspace in Norwalk, CT and founder of CT Robotics Academy. He teaches 3D printing and design at the makerspace as well as electronics and programming classes.