I'm somewhat new to science buskers, I have successfully experimented with "fire hands" and am excited to see what else I will do with my time at buskers.
Hovering cups experiment
I am unsure if this idea will work however I think it could there is still a chance of it working.
Unfortunately today conditions are not suitable for the Vander graph machine, however i have gotten the aluminium cup to rise/hover more slowly over my hand.