Hand chimes

I have a question for you, folks. I'm writing an article for my newspaper about a local hand chime choir for seniors. After my interview with the choir director, I started thinking: what is a hand chime? And I realized I didn't know. So I googled it, and came up with a whole lot of new information for myself. Am I the only one who doesn't know what hand chimes are? Do you know, before you google it? Do you know how they look or how they produce sound?

I included some of the basics of hand chime trivia in my article, but maybe I shouldn't? Maybe everyone but me knows? Before I send the article to my editor, I decided to ask the question.