Robert opens the Household Dashboard, and is presented with the Chore Assignment screen:
Here he is presented with the chore assignment screen. On the right, a list of children appear, with the Add Child button on the bottom. Initially, no butons but the Add Child button appears in this list. To start using the app, Robert presses the Add Child button, displaying the Add Child screen: 
In this window Robert can create a profile for his children, he creates one for Joffrey here. This brings Robert back to the Chore Assignment screen:
Here Robert can drag a chore icon onto the children he's set up to assign them a chore. Clicking a child brings up that child's task page, where Robert can adjust deadlines for the tasks. 
This design incorporates the notion of a scoring mechanism. Completed tasks add to the person's score value.
When Joffrey logs into the application, he's presented with this screen that allows him to mark a task as completed, or postpone it for later: 