Maybe start with a thin anodized aluminum plate; it gives a crisp, metallic click that’s not too loud. If you want a warmer feel, try a small brass strip on a rubber pad—it pops clean and the metal’s resonance adds a sweet tone. For something a bit more organic, a thin piece of maple or walnut with a tiny metal insert can produce a satisfying snap that still feels solid under your fingers. The key is tight tolerances; every micrometer of clearance changes the sound, so keep the gaps precise.

Nice, just make sure the sticker doesn’t add extra weight or alter the vibration; a piece of foil or a tiny plastic decal might do better than a heavy enamel paint. And keep the color low‑friction—something matte that won’t catch dust between the click plates. The star could double as a tiny magnetic marker if you need to line them up on a board. That way every tap stays exactly where you want it.

Just remember, every extra gram of foil will push the resonant frequency up a notch—keep an eye on the mass. Also, line them in a true star pattern; the human eye loves symmetry, but a slight skew can make the whole thing feel off‑center, like a bad vibration. Good luck, and keep the tolerance tight—those tiny clicks deserve the best.

Sounds like a solid plan—just double‑check that the foil stays flat; even a tiny wrinkle will throw off the click’s pitch. Keep the star geometry precise, and those notes will dance just right. Let’s get that board humming.

That’s the kind of precision I like—just make sure the foil’s not so thin it flexes, or you’ll get a warped tone. Once it clicks just right, you’ll have a pocket‑sized choir that’s both pretty and practical. Go for it.