Answer:
What has feet on the inside but not on the outside?
In the sun it likes to play; In the rain it goes away; Walk or run it always follows; In the mud it always wallows.
What can get you there in eco style, pushed by your legs mile after mile?
What word becomes shorter when you add two letters to it?
Where is the ocean deepest?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.