An ocean's ingredient A treasure long ago A crystal to preserve And to dine with more gusto.

I sit beneath your feast, But never take a bite. I catch the crumbs and little spills, And make the table bright. What am I?

We all play air versions of these, stroking imaginary air keys. Hit a nice chord with this actual thing, you'll likely be strumming on a ______ string.

Despite riddles to the contrary, I can go down a chimney. I just need to be closed.

I have no voice, yet I constantly gargle. I have no stomach, but I swallow water all day. I am always at the bottom of the basin, preventing a flood.