What goes up and down the stairs without moving?

What can be swallowed, but can also swallow you?

What runs around a house but doesn’t move?

I can be found in water but never wet. What am I?

I am a fruit with seed on the outside. What am I?

You hold my tail while I fish for you. What am I?

What grows when it eats, but dies when it drinks?

I am the only organ that named myself. What am I?

What coin doubles in value when half is deducted?

You can draw me, fire me or fill me in. What am I?

What is drawn by everyone without a pen or pencil?

I fasten to walk, and unfasten to stop. What am I?

What invention lets you look right through a wall?

What’s the easiest way to double your money?

What has a head, a tail, is brown, and has no legs?