Back in 1963, baseball legend Stan Musial released a phonograph LP record (Stan the Man's Hit Record) with a photo illustration booklet enclosed, as an instruction for little league baseball hitters to improve their game. It has some interesting insight into Stan's hitting technique, and how he achieved renowned success at it.
The original record is available by resellers for as little as $10, and as much as $150. An autographed copy can be worth $3000. But as a way of marketing baseball memorabilia, I think this loses the original intention Stan may have had for making this recording -- a way to teach young baseball players how to improve and enjoy their hitting skills.
For those of you who don't have iTunes, I have the mp3 file version, with a PDF of the instruction booklet to follow along with:
And as Stan says, the important thing is to have fun!