riddle me this...

Today is Columbus day.  To celebrate I give you............riddles.
yay.

Put me in a bucket and I'll make it lighter.  What am I?


Here's another...

Tall and young, short and old.  What am I?


And another...

What rock is commonly known as the bathroom rock?


And another...

What rock sounds like a swear word?

 These riddles are courtesy of my 13 year old step son.  He kept 'em coming and then said, "wow, I'm full of it today, aren't I"?

You said it, not me...;)