My son is nine and avoids salah unless I stand over him. I do not want prayer to become a punishment. What has worked in your homes?
At nine, the goal is companionship, not compliance. Pray beside him, in the same room, without comment for two weeks. Then ask him to lead once.
We stopped calling it "praying" and started calling it "our time". Same act, lighter weight. It changed the tone at home.