If you have a shooting buddy with you, there's a great way to try your hand at moving targets.
Buy a cheap radio controlled car (You can find them in the 20 to 30 dollar range) and attach a lightweight rod or wire upright on the car. I use an old fishing rod. It should be between 4 and 6 feet tall. Put an alligator clip on the top of the rod, and clip a balloon to it.
I almost forgot that it's important to get a car with a wide wheel base so it doesn't tip over during turns.
Have your buddy run the car out to the distance you want to shoot, and have him run it in an unpredictable zig-zag pattern.
Then try to hit the balloon (try not to hit the car
) It's loads of fun and never gets boring.