Give it to Your Kids

This is probably the easiest thing to do with an old Apple Watch. If you have children, you can give them their first Apple Watch.
Doing this has many benefits. You can use it to communicate with them, even if they’re not at home. It’s also the perfect way to track them when they’re out and about without constantly calling them to ask where they are. Thanks to Apple Watch Family Setup, your kids can use an Apple Watch without an iPhone.
However, if you plan on giving them an iPhone when they’re the right age, the Apple Watch will also be the perfect way for them to get used to the Apple ecosystem and everything it comes with.