The characters are a boy and a mouse. The boy watches over the mouse. The mouse loves to explore, and do many different things at school.
There are many conflicts. The mouse uses all the boys pencils and paper, gets very distracted easily, and when they get home from school, the mouse realizes he left his lunchbox at school, so the two have to go back.
The boy takes his mouse to school. The narrator adds to the list of actions that the mouse does. When they get to school, the mouse does experiments, then needs to write a story, then needs to eat lunch, and then wants to play games.