Windxtasy said..
despite not having windsurfing parents to teach them.
I think that's the key. Kid's don't want to learn from their parents. It's not cool to do things your parents do. (not when you are 12)
They want to do things their mates do.
Actually, I have 2 kids who windsurf and they really wanted to do what the rest of the family does. Happily, mine haven't reached that age yet (when parents stop being cool) - at the moment my son says I'm his hero

I have always said it's really vital to teach them young. And we CAN now that kid's gear is available. There's no point using cut-down or heavy gear because it is more likely to put them off. I think too many people don't realise that beginners of any age need the best most appropriate gear. It's only really determined people who will persevere if the gear isn't friendly and right for them (or people with nothing better to do than beat their heads against a brick wall).
You often hear about young kids begging their parents to let them have a go but the parents either don't want to give up their windsurfing time or can't afford the extra kid's gear (especially if they're not sure the kids will continue). Some don't realise that there are some great offers available for kids rigs.
And while we're at it, there's another often quoted excuse why we windsurfers can't teach our kids/family - some people have accepted it as gospel that you cannot teach your wife or kids. Sounds "convenient" to me... It's my view (and I have direct evidence having taught my wife AND my kids) that we are the BEST teacher for our own families. Of course there will be issues but since we are going to be their on-going sailing buddies, it is good to start at the beginning. You learn how to teach and you forge a really vital bond that will hold you in good stead through the coming teenage years. You have to give up some of your own windsurfing time for a season but going through the challenge has a lot of rewards - my whole family windsurfs now and I never get in trouble for buying new gear or booking a holiday in a windy place