Check out the latest tutorial from Erin St. Blaine: make a magical floating fireball prop for your Cosplay character. A snap of the wrist makes the LED flames flare up brightly! This is a fun beginner project, with no soldering required. The code is done in Microsoft MakeCode, with a drag-and-drop code block editor, so it’s easy to change colors or animation triggers.
From the guide:
Complete your cosplay with this Magical Item: a floating fireball that flares up at your command. Whether you’re portraying Kael’thas Sunstrider from WoW or trading flaming shots with Super Mario and Luigi, this fireball will push your outfit over the top. This is a very easy project, with no soldering required. The Circuit Playground board makes motion-sensing programmable lights a snap. Customize your colors and your animation speed with Microsoft MakeCode’s drag-and-drop code editor. You’ll be stopped for so many photos that you’ll never make it to that panel discussion at DragonCon.
Full tutorial: https://learn.adafruit.com/cosplay-fireball-prop-with-motion-sensing/