my son accidentally deleted my hut team

Hello. When a team is deleted, your progress with objectives and the XP path will remain. I'm sorry to say, we can't help with this. There is a confirmation for deleting your team so we have to assume that there is intent to delete it. We also can't help when someone else deletes a team without the owner's consent. There's nothing we can really do to make sure that doesn't happen. It's on the account owner to make sure it's locked down so someone else can't log in and make changes.