Glow-In-The Dark Thread
Seriously now, no joke: these threads glow in the dark like cray-zay! A finer, coated thread (not a separable floss) that you can mix with your regular embroidery to make it light up when the lights go down! Super neato. Five different colors, five yards per spool. You just "charge it up" first (hold it close to a light source) then go run in a dark closet. OoOOOh!