I feel like writing a book. Beginning Softball Using a Tennis Ball
I bought a sling shot that shoots tennis balls. It looks very similar to the hunting version with the forearm brace... Only used it once, at maxed out, the ball only goes about 50-60 feet. Waste of money, your better off just tossing it up yourself.
A cheaper version..use a tennis racket to hit the balls! works great for my girls