You'd probably need to start with a lone crow. As a group they can be quite nefarious and clever about it. I once slowed down a group of crows from killing and eating an injured bird; once they boldly got past my interference, they formed a sub-group and that sub-group followed me all the way home (1/2 mile) hopping from tree to tree, cawing the whole way.
No wonder people thought they were witch familiars.
I saw crows doing that with a fox once. The fox looked very displeased
> they formed a sub-group and that sub-group followed me all the way home
A subgroup of crows is called a manslaughter
Two crows have recently taken up residence in my backyard, along with my friendly bush turkey, Doug. They’re so much fun to watch and interact with!
This is also a goal of mine. I have read that they like peanuts still in the shell.
Over the summer my partner taught our local gang of crows that if they come to our house in the morning and the afternoon and make some noise, she'd come out and throw them peanuts and meal worms. We're not on petting them terms, but we've got an understanding. :D
Nuts are good. Or any kind of dog or cat kibble.
There was a documentary in Japan a few years ago that showed local crows going absolutely crazy for mayonnaise. (Ketchup, on the other hand, they had zero interest in.)