David Kha amazing tennis ball and can
Check out the video of the pioneer of tennis ball and can tricks from the USA.
I met David at a super convention on lopez island just off the coast of seattle, he introduced me to the wonders and possibilities of this versatile medium.
Once I started with tennis ball and can I was hooked, it feels really great, travels well (light and comes with its own container) and you can get a set for $3 last time I checked.