How do I change my child's name, age and other personal details?

To change your child's details:

Go to the "More" menu in the bottom bar
Select "My family" (in the "ACCOUNT" section)
Select the child to open the child's profile page, where you can edit the child's profile photo, age, name, gender, birthday, skin color, and your relationship to the child. You can also invite or remove Caregivers, friends, and family, and report health conditions.
Select "Save"/check mark in the top right corner to save your updates