Young Al Edison's teachers told his parents he didn't pay attention and would never be a good student. In fact, he just couldn't hear what they were saying. Ear infections had damaged his hearing. Al's mother knew he was very smart. While he was home sick from school, he worked on experiments in a lab he built himself. Read about Thomas Alva Edison's adventures and inventions, and find out how a man who could hardly hear became the wizard of sound.