Any of your child(ren)'s interests interest you now?
With me it would be dinosaurs because of my ds(4). I never got into them as a child and now that he is so fascinated with them he asks questions. Then I have to research. I'm beginning to love dinosaurs because of him. He loves the Cretaceous Period because his favorites like Spinosaurus are from that Period.
So do your children have you interested in any of their interests?