Ahhh... That's my boys!
Funnily enough as much as they like the boxing bag, and play fighting amongst themselves (until someone actually connects), they will run from their Great Grandfather when he tickles the life out of them, or if tries to play wrestle with them, because they find him too rough.
So they're actually quite averse to rough behaviour, Great Grandpa has to gentle it down quite a bit for the boys so they're not intimidated by him at 87 years of age. Go figure! ASD the intricacies...
I know, Miss 1 is less afraid of his playing around than the boys! But that’s just how they are I guess. Constantly trying to figure them all out.