Clever riddles for kids

What has no beginning, end, or middle?

Armored but not a knight, snapping but not a twig, and always at home, even on the move. What am I?

What's the missing letter? J ? M A M J J A S O N D

I dig out tiny caves, and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them. What am I?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

I have a little house in which I live all alone. It has no doors or windows, and if I want to go out I must break through the wall. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

If a farmer has 5 haystacks in one field and 4 haystacks in the other field, how many haystacks would he have if he combined them all in the center field?

I have all the knowledge you have. But I am small as your fist that your hands can hold me. Who am I?

Where do fish deposit their money?