I designed the arrow template in Tinkercad, so it’s ready for laser cutting or 3D printing. Download the appropriate file below if this is your jam.

Since my 3D printer was down, I just printed the template onto paper and cut it out of 1/8” poster board. I used a bandsaw to cut both layers, then drilled the holes using a drill press with a 5/8" bit. Be sure to clean the bit frequently and use a spoil board so the holes come out clean on the back side.

Once the shape was cut and painted sparkly red, I added the lights. Since they’re directional, I didn’t want to just toss them in randomly. I used tiny rubber bands (from the dollar store) to manage the cables and ensure even spacing. Then I hot-glued all the lights in place.

At first, I tried to attach the arrow to a halo-style headband to make it float above my head, but that didn’t quite work. Eventually, I attached it to a top hat using a fancy elastic band from a costume shop. Inside the hat, I taped the battery and Sparkle Motion board to the top—maybe not the cleanest solution, but it worked and didn’t damage the hat.