Sounds wild, but I love a good gamble. Grab a cheap LED strip, run it through a tiny Arduino, and wire it to a shift register that reads the top card of a deck. When you flip the card, the strip lights up in a pattern that matches the suit—red for hearts, blue for spades, whatever. Keep the code short, use a pull‑up resistor for the card reader, and you’ve got a living costume that’s both a show and a bluff. Let me know how it goes, and if the deck starts flipping on its own, we’ll know the system’s alive.