If you want to know what pure joy looks like, watch 22-month-old Dylan Lipton-Lesser hearing clearly for the first time.
In the video above, posted to YouTube by his mothers, India Lipton and Shirley Lesser, he tests out his new hearing aids at the Children's Hospital of Richmond at Virginia Commonwealth University.
Dylan's experienced hearing loss for most of his life, Lipton told The Huffington Post. But now, two months after getting his hearing aids, he loves listening to and playing music. Here he is on the piano: