what do ya all give are do to keep your chickens happy and busy inside the coop for days they are locked up due to bad bad weather??
Locked in a coop without run access would be quite challenging. Assuming your coop is large enough - a flock block, treat cages, rig a sand bath. Anything that makes them scratch and peck something other than their flock mates. There are a number of past threads on the subject, but not sure how many address confining indoors. https://www.backyardchickens.com/newsearch?search=entertaining+chickens Above link will take you to a page of threads on the subject. Hope this helps.
I hang half a head of lettuce or broccoli(or really any vegetable that comes in head form) about an inch above the hens. Or I'll sprinkle some scratch around works like a charm.