Related Clues:

• Didn't sink
• Bobbed along
• Was buoyant
• Behaved like a buoy
• Drifted on the surface as of a liquid
• Stayed on the surface of liquid
• Traveled by inner tube
• Moved like a ghost
• Was a good buoy?
• Suggested, as an idea
• Moved on a liquid surface without sinking
• Was a really good buoy?