im sorry if the title isnt clear but im going to try to explain it in better detail here
What i want is for all the parts including head, left leg, arm, etc. to have CanCollide on. I have tried to insert a script into starter character scripts which turns on CanCollide. However when i run it CanCollide just turns of right after i run the game

2 comments
I see your problem, but I don't really know how to fix it. It seems there isn't actually a way to get around it, based on the devforum. Nevertheless, I can try to help you find a way around it, if you tell me why you need to change this property for those parts
You can create invisible hit boxes and weld them to the parts although it will definitely cut down performance