Mr. McRae: I think it looked great! I don't foresee laymen understanding the principal. With an appropriate story/setup, it would be very entertaining and magical as stand-up for 5 to 9 yr olds and adults.
And thanks, Mike, Kjell, and Quentin for the constructive comments!
Jonathan: Maybe it's an American vs. Scottish thing, but despite Mr. McRae's comment re close-up, this is obviously a stand-up / kid show routine, where examination is not an option.