Hi and welcome to this club none of us choose to join!
My children were 9 & 10 when I was diagnosed last September (similar diagnosis to yours). One of the first things I told them was that I was not going to die! My husband & I have been very honest & open with them and told them about every procedure and treatment as it came up. They asked lots of questions which we answered as best we could but also let them know we just had to wait and see sometimes, as it was all new for us too!.....as Robyn said, they are very resilient & have been pretty good all the way through.
When my hair started falling out we made a special "date" and the kids had turns in clipping it short.....I wanted to make it more fun than scary for them to get used to seeing me bald. I took them to chemo during the school holidays so they could see where I had treatment.....showed them my scars etc & let them hold my prosthesis which they suggested would make a great stress ball!
I spoke to their school teachers & principal so they knew if any problems arose at school which there didn't. My son was at first a little embarassed when I started wearing my scarves instead of my wig but soon got used to it.
As scary and daunting as all this is, you will find great support and understanding on this forum...just remember to take one day at a time.
Jenny x