You have created a profile for one child & now you need to create a separate profile for your other child/children. Simply log into the existing account, click on the child's name in the top right corner & select 'Add Profile'.
Here you will then enter through the details of your child & select 'Create Child' - your child's page will then be activated!
Hot Tip! You can then navigate between the children's accounts by clicking on the name in the top right-hand corner.