The idea is that the little bowls collect rain drops and then tinkle together when they fill and spill. Still haven't heard them in action, but they sure are pretty!
When I saw these in Granville Island I knew I had to find a way to get them home. Fortunately, it wasn't as much of a challenge as I thought it would be to pop it in a box and carry on. Now I have a great reminder of our trip in my back garden, even though it turns out they are available online from Amazon.