https://www.youtube.com/watch?v=iR1bdFlpZ10 It's unicorn season! Last year we 3D printed a unicorn horn, this year we made it simpler! Redesigned in Fusion 360, this unicorn horn features a spiral design and tabs for sewing onto garments such as hats, hoodies and other headware. This unicorn horn lights up and features a UV Purple LED, so it's magical as it is whimsical.
Full Tutorial: https://learn.adafruit.com/simple-led-unicorn-horn/overview Download Source: http://a360.co/2d62etr