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Jonny5rd writes –

“This “electrochemical and electromechanical apparatus for the display of illuminated messages” is really a (heavily) modified persistence-of-vision toy. This toy was a pen i picked up at the local pharmacy (Walgreen’s) with a spinning head that displayed whatever message you programmed in. It was only $5.00, so i picked up a couple and let my imagination fly.

This is by far the most sculptural of all my creations, as it really serves no practical purpose :)

All in all, it cost me about $20US and two weeks worth of spare time (about 10 hours)” Thanks Mikest! – Link.