Playground has two designations for guardian relationships - primary and secondary. Select the checkbox for "This is a primary guardian" to make a new guardian primary. Primary guardians have the ability to check in and out, pay bills, complete documents, chat, and view the feed. Secondary guardians do not have access to anything other than pick up, drop off & some posts on the feed.
Guardian relationship options:
Mother
Father
Sibling
Grandmother
Grandfather
Babysitter
Uncle
Aunt
Stepfather
Stepmother
Legal guardian
Nanny
Cousin
Family friend
Neighbor
Foster
Other