It's common for a family to hand down devices from one kid to another. Here's how to make the switch in Bark:
If applicable, uninstall Bark from the device(s).
In your parent app / dashboard, remove the device(s) from the kid that they no longer belong to.
Set up the device(s) again but this time under the child that owns them.
Have a Bark Phone or Bark Watch?
Then, you'll follow a different process (learn more).