You can turn them into security cameras. There’s an app called Alfred that allows you to set up the phones as security cameras and then the app on your phone you can view the streams. It works fairly well.

I really liked this feature, but my toddler constantly changes the face when playing with my watch. So I may have to leave it off :(

I really like Apples reminders app. It can be really powerful once you spend some time on it. Same with the notes app. And I like them bc they integrate so well with other first party apps.