Whats lurking 20,000 leagues beneath the bubbles? No one knows. But these little guys are ready to sound the alarm should the Loch Ness Monster surface. Each Tone has a whistle with three volumes‰ÛÓLow, Medium and High‰ÛÓthat blows when the top of the boat is tapped. They even attach together by their rings for safe passage across Bathtub Bay. All aboard for fun!