Very easily and with the same principle as your pets, but without the collar!
For children, they can be attached to a school bag or placed inside a school back. Alternatively, ask them to keep it in their pockets.
For elderly relatives, this is the ideal device as they can be more reluctant to use a mobile phone. They can keep it in their pockets or, especially for those suffering with an illness, we include a handy lanyard to keep it around their necks.