3

BrickLink only has that one match for conductive, so I'm guessing that's it.


2

Any metallic or metal coated parts (spoon, aluminium foil, pen) should be usable with a contemporary touchscreen, although proper touch recognition still requires a human (or an equivalent capacitor) to touch the conductive surface. Therefore theoretically any of these official LEGO parts with exposed metallic surfaces (or similar ones) should function, ...


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