I think I would remain quiet for a bit. He's just starting to initiate contact w/the children and you don't want to "scare" him off by contacting him just yet. He's inquiring about you and that's a step in the right direction. If the contact continues between him the children up to the holidays, I would send him a msg. that says something like "Happy Holidays. I hope you have a nice holiday season". Nothing too personal.
Continue to give him time and space.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
