WieWaldi if my theory is right, you could buy the bounce piano and, with your two feet, jump faster than he juggles (or if you really want to impress us, go even faster by using your 10 toes).
I spent the last week trying out different approaches. Here are two that I think I will abandon, even though they are good ideas and I'd love to hear someone else try these approaches:
gospel
professor longhair
The approach that I'm currently most interested in is using it as a modulation exercise. The rhythmic, melodic, and harmonic repitition give a lot of modulation choices, and I could use more practice changing keys on the fly. But if this approach yields nothing musical, I will fall back on the straightforward approach: playing and singing the way I would for a general audience.