Yeah, our kids learned not to touch our stuff when they were young. We also provided older devices and other things so it didn't entice them so much. My son had an iBook G4 when he was five and both my kids used to play with an iPhone 3GS.
Turnabout is fair play though. One is a sophomore in college now and the other a freshman in highschool. We don't touch their stuff unless we have their permission. That said, my daughter who hates cases, had a case forced upon her when I got her an SE 2020. She had taken a perfectly good 6s and destroyed it. I'm still paying for the SE 2020 so she has to deal with the case.
My son, OTOH, had always been good with his phones. His SE 2020 and his older SE 2016 are still in very good condition.