You can have two adminstrators for your kid's XPLORA. Both have almost the same rights, with the only difference being that only the primary administrator can add and remove administrators.
In order to serve as a secondary administrator for an XPLORA, you have to download and install the XPLORA-App on your phone and connect it with the XPLORA in the same way as the primary administrator. The secondary administrator has to create their own account with their own user name and password.
Once the XPLORA has been added to the app of the person who is supposed to become secondary administrator, the primary administrator can simply grant administrator rights in the "Contacts" menu. To do so, simply draw the name of the secondary administrator from the field "Contacts" up to the "Guardians" field and tap "apply".