Well, my wife uses Orff instruments and teaching methods in her day job as a music teacher at a Catholic school here in St. Paul, Minnesota. She teaches kindergarten through 6th grade. As a matter of fact, just today I was watching a video tape that she made of some of her students playing xylophones and African-type drums. The kids certainly seemed to be enjoying themselves. And she says the parents love it.She's also working on her master's degree, and that's why she made the tape.
I'm no expert, but I'd be happy to pass on any questions you might have to her. I will also let her know about this thread. (I don't think she has ever looked at Mudcat herself.)