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A large plexi ball with embedded magnets, and a (also plexi or glass?) tower with copper or aluminum spaced out in stripes (would that work? It should?) so one could see through it all, and especially see that there is a lot of air between tube and falling ball.

That would be scary, and a cool experience, I think.

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Plus a means or magnet arrangement to prevent tumbling. But it would be very dangerous getting in and out without special engineering.

Hm, like a door? :-)

I really like that approach-- you could also increase the conductive stripe density towards the bottom, for a more free-fally experience at first.

This sounds like a really fun ride, actually.

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