Google: DIY moveable Tetherball pole.
You make it from an old wheel and tire filled with cement.
damn it. Now I'm liking the tire idea more (wider base and easier to roll)
Wonder if some service station has crap ones they'd give away (rather than pay to dispose of)
Your son is well on his way to being the eventual replacement for Braunie. Kind of geeked about this move. #8 will be Milwaukee's #2.
Thanks for the suggestions. Honestly we do a lot of that stuff (or similar) with him already. This is just one more thing that he can do on his own and with some buddies goofing around. A bunch of them have them so its the "cool" practice toy with them right now.
The main thing at this age is that he's having fun, so that's great!
The guys over on Baseball Fever helped me a lot as far as teaching proper mechanics. There is also tons of great stuff here if you ever want to study up:
http://www.chrisoleary.com/projects/Baseball/Hitting/index.html
If you said there are basketball hoops across the street, is the thing portable enough for him to just go there and set it up when he wants to use it?
In any case, good for you, I used to just hit tennis balls against our garage doors all the time. They really took a beating, but my dad never seemed to mind too much. Really noisy, though.
Finding a 4" steel pole is the trick. The only thing I did find at HD yesterday was one of those beam support poles (adjustable screw height like you'd find in a basement or temp construction.... $80. Pass.
In closing:
https://picasaweb.google.com/joe.potrzebowski/Misc#5599173766588326114
Sadly it has some decent wobble to it (due to not being metal of course). I have a feeling it's going to work itself free/loose from the concrete after a few thousand whacks.
Hehe, that does actually look like fun.