To add a second child to your account, click on your profile icon in the top right corner of the game dashboard and select the My Profile from the drop-down menu.
Then click the green "Add a Child" button. You'll need to enter the parent code associated with the child to add them (you can get this code from your child's teacher).
Switching between classes and students
You can switch between your child's classes using the menu at the top of the screen.
You can also click on their name beside it to switch to a different child's character.