gosh, here's an idea (Score 1)

how about you prepare them for the real world, instead of the fantasy "linux will rule the desktop market one day, i know it" world you live in? teaching kids ubuntu, and then having them switch to "normal" desktop systems after leaving your little village is just going to turn them off. if you need to jam linux down their throats at such an early age like big tobacco does (get em young!), so it as an after school "linux club". unless you really don't give two shits about the kids themselves, and just want to have an excuse post back later about how cool you are... then do whatever you want. i imagine you will anyway.