>>4517

5e rules:

"A chain has 10 hit points. It can be burst with a successful DC 20 Strength check. It has 19AC."

My favorite rule for DMs Rule 0: "The D&D rules help you and the other players have a good time, but the rules aren't in charge."

To me the best course of action would be one that's fun, interesting, novel, intelligent, funny, productive, or high quality. These types of actions will almost always succeed.

As far as lockpicking, each child likely has two locks but the chain itself has an unknown attachment as Ashley can't see it from her current location.

It could be anything from a simple ring hook as chains sometimes have on them to a oval on a ring hitch. It might also have a lock or just a shackle.