CFK-
I always believe rules are meant to be broken...when appropriate. I would see if you could persuade the college to change the rule (age limit or credit pre-req). Or maybe try one audit and then approach them. I know my kids would find it difficult to do all the work without anything to show for it.
Also, as an aside, my DS 11 is taking a community college math course for credit, but before we negotiated an agreement between the middle school and the college, he took Fractal Math online, which he enjoyed, and Statistics. Going outside the standard sequence might be enjoyable.
