For the event management system generally you check children in and out after assigning a caregiver, but you can enable a setting for the event to check them in and out without that!
To update the setting to enable checking children in and out without assigning a caregiver, click to view the details of the event
Go to the children view and click the gear icon on the table header:
Enable the setting to allow checking children in and out without assigning a caregiver!
