When I first joined early this year, I started a Post on whether and what to tell kids (mine are now 13 and 11). There was a good response of well thought out responses, ranging across the spectrum of yes to no (and all manors of info to say).
In the end I decided to not tell them. But there was one way of telling that hit me as brilliant and I stored it away for future reference: it was to say my blood has some bad bits in for some reason, but not to use the L word or the big C word.
Well I finally told them a few days ago along these lines. They are very concerned, but seem to have reacted very well. I still have the odd 'white' lie in that I answer the 'why is it bad' question with 'the docs don't know'...but I feel very relieved they now know something and have not gone over a cliff.
I can not remember who come out with this strategy, but it is brilliant. So whoever it was, THANK YOU!