Love the spark—superhero kit sounds fun, but let’s nail the core before we splash paint everywhere. Start with a lightweight, heat‑shrink tube for the cape that has a dye‑in‑gel layer for the color change; it’ll be a simple switch when the wearer moves. For the mask‑keychain, a quick‑release hinge and a magnetic clip can turn it into a keychain in a second—just keep the weight low so it doesn’t snag. And the gauntlet‑style light—LED strips with a tiny microcontroller will do the trick; solder everything on a thin board and wrap it in flexible silicone so it stays on skin. Make a checklist, get the parts, and test each piece one by one. No one likes a cape that falls apart mid‑flight, right?