Here, Robert is presented with the child selection screen. To assign a task to Joffrey he clicks on Joffrey's profile.
This opens the To Do list for Joffrey:
Then to assign Joffrey a task, he picks one from the list: 
And takes a before picture. 
Then he exits the application.
Joffrey, upon opening the application, sees this:
And knowing that someone left something for him to do, he opens his To-Do list:
And to mark the task as completed, he opens the task and submits a completed picture: 
This removes the red notification icon.