 You can make a 3D-printed LED headband inspired by Bo-Katan from Star Wars. This design features engraved details that wrap around the headband and uses an adjustable strap to fit comfortably over your head. The LEDs are powered by a Coinsil breakout hidden inside a 3D-printed battery box on the end of the strap. These miniature LEDs come in a few different colors and they're pre-wired so they're great for prop builders and model makers. The Adafruit Coinsil breakout features an on-and-off switch, header pins, and mounting holes for securing to your projects. Download the free CAD files and 3D-print them in your favorite filaments. The design is open-source so you can customize the headband to fit perfectly over your head. The wired LEDs are threaded through the built-in recesses and hot glued in place to create a DIY diffuser. Once it's cooled down, you can use a hobby knife to trim away the excess and square it up so it looks nice and clean. Solder the blue wires to the ground pins and the red wires to the switch's power pin. Thread the elastic strap through the slits on the side of the headband and add a metal clip to the ends to keep it fitted. The strap can then be threaded through the battery case and the breakout board is secured with machine screws. The CR2023 Coinsil fits into the breakout and should last for several hours. This chunky button actuator press fits into the top cover and gives you much better access to the breakout board's slide switch. Snap fit the cover over the case with the LED wires inserted through the built-in slit on the bottom of the cover. The wires are then hidden behind the elastic strap and sewn in place with just a few stitches. We really like these tiny LEDs because they're easy to work with and we think they're great for making props with embedded lights. We hope this inspires you to add LEDs to your projects and check out our guides on learn.aderfruit.com