A giant 10 x 10 LED board game of Battleships all controlled by an old 1960s Swiss rotary Bakelite phone.
Motors, LEDs, and Christmas trees. Make your very own electronic zoetrope and hang it on your tree.
Use only 3 wires to control an infinite number of 7-segment single digit displays!
LED hammer for a Ramona Flowers costume using NeoPixel strips.
Novelty heels with custom made infinity mirrors.
Glowing headband created with Neopixel Rings, a LilyTiny microcontroller with custom program, and painted foam wings.