Here are two simple rephrasings (each 39 words) for a 6-year-old:
- Hearing begins when a sound wave travels into the outer ear and hits the eardrum. The eardrum pushes three tiny bones that carry the sound into a snail-shaped tube (cochlea). Then the nerves send the message to the brain.
- Sound makes hearing start when a wave moves into the outer ear and bumps the eardrum. The eardrum moves three tiny bones, which send the sound into a snail-shaped tube (cochlea). Nerves then also tell the brain the message.