The best way to teach a kid hitting is to use a batting tee. Once they master hitting off a tee, try a light under hand toss about 20-feet away so they can understand ball flight. Once they master that, throw over hand so they understand tracking the ball. Then use a spring release machine to simulate the pitch from the proper distance.
THEN do soft toss.
Once you master that, give your kid a broom stick handle and buy a big-ass bag of pinto beans at Wal Mart and teach them to hit the bean. It focus on the occular muscles of the eye and trains the aspiring hitter to focus on the core of the ball so as they move up in skill level, they can effectively hit a curve ball, changeup, slider, splitty or any other type of pitch. Once you train a hitters eye, you can hit anything.