Find My Apple

Find My Apple uses the iCloud service to locate your familys Apple devices. It shows them on a map, and allows you to play a sound to help you find them.Setup Find My iPhone, iPad, Mac, and Apple Watch using ICloudsee https://support.apple.com/explore/find-my-iphone-ipad-mac-watch
If you would like to be able to track your family, you need to first set up family sharing for iCloudsee http://www.apple.com/icloud/family-sharing