Have you ever wondered how you hear? Think about trying to catch a small ball. You might cup your hands together. Cupping your hands helps you catch the ball. Your ears are shaped like cups to help catch sound waves from the air. Your ears have three main parts.
The outer ear is the part that you can see. It moves the sound waves to the part of the ear inside the head.
Inside your ear, you have an eardrum. The eardrum is a special kind of skin. Sound waves push against the eardrum. This makes it vibrate, or move back and forth. Then the tiny bones in the middle ear vibrate.