Dancer
One night when I was sleeping I had a dream.
I was visiting a Swedish funfair. There I saw a ride
that I had never seen before. It was red and white in color
and it looked very old. The mechanism was quite simple but
ingenious. Then I noticed that it was a dream so I studied
the mechanism carefully in order to be able to build a model
of it when wake up. So here it is...

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The gondolas spin around at the same time as they go up and down.
The two gondolas balance each other so it's very light to turn.
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Video here:
dancer.mp4
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