DH has cancer... Telling kids: What? When? How?

saturdaynightdoubletree

I am a firm believer in being honest with kids and not sheltering them from bad things. I also don't want to scare my kids or create terrible memories. I don't know how to handle this news myself, and definitely don't know how to even begin to discuss DH having cancer with the kids. DD1 is wise beyond her years, so I know I need to be extremely thoughtful with this. Any advice?