Educational Innovations is very excited to make available these full-sized Chinese spouting bowls. Simply fill the 15" diameter bowl halfway with water and rub the handles vigorously with wet hands. The resonance set up within the bowl is powerful enough to actually 'spout' water up and out of the bowl! Totally amazing! We first saw these bowls demonstrated at the Ontario Science Centre. We're sure you will be as amazed as we were. Also available: Spouting Bowl Pad - The perfect base for playing your Spouting Bowl. This pad will keep your bowl from slipping, while preventing the loss of vibrational energy.