3D printed a simple holder for coin cell batteries and make LED throwies that’s re-usable. Just pop in a coin cell and press fit them together. Build an LED throwie kit for your classroom or workshop. Resources & Learn Guide: https://learn.adafruit.com/led-glowing-slime/ 10mm LEDs https://www.adafruit.com/product/846 2032 Coin cell battery https://www.adafruit.com/product/654 Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe Join our weekly Show & Tell on G+ Hangouts On Air: http://adafru.it/showtell New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------