Basic Math
You put paper in the tray and it puts ink on the paper.
What is the printer?
You move it on your desk while it is connected to a computer.
What is the mouse?
There are this many states that make up the United States.
There are 50 states?
The device that provides images or videos.
What is the monitor/screen?
What do you use to type?
What is the keyboard.
What does the mouse rest on?
The mousepad.