The Kurds teach their kids to use a sling for small game. They use a thing "staff sling" to give the kids the right timing and arm motion. The only difference between the staff sling and a regular traditional sling is that one of the cords is replaced with a stick. The sticks are roughly oval in cross section and 2 to 3 feet long. Naturally they release the string and not the stick when they throw. I tried this method and it is really quite easy to use. Later I found out that Assyrians used it and some ancient seafaring nations used it because it wouldn't foul the rigging. There is basically no windup. It's used something like an atlatl and can be attached to a walking stick.
Ron Hood
diogenes@SURVIVAL.COM