L.E.D. Kippah
From Bangitout:

Introducing the LED Kippa scrolling digital message kippa, which can display a neon message on the yarmulke. Forget copyright infringement Nike & Sponge Bob Dugma’s – this yarmulke will rely on your wit rather than a half-assed Shrek design. Of course, kids will be able to display curse words directly on their kippa, which hopefully this will rid the Jewish world of kids wearing their kippa on their forehead (in order to hide the profanities for only those behind them.) Not sure if these are muksa (sounds like it) But check them out here: http://www.ledkippah.com/

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