Best hard riddles for teens

I am a 5 letter word. Take away the first letter and I am a country's name. Take away the first two letters and I become the opposite of the 5 letter word. Who am I?

Who is bigger: Mr. Bigger, Mrs. Bigger, or their baby?

What do you get when a turkey lays an egg on top of a barn?

Why don't tigers like fast food?

A lawyer, a plumber and a hat maker were walking down the street. Who had the biggest hat?

Who makes it, has no need of it. Who buyes it, has no use for it Who uses it can neither.

I have lot of memories, but I own nothing. What am I?

What is the first thing a storm cloud puts on after a shower?

A bus driver was heading down a street in Colorado. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

What was the biggest island in the world before the discovery of Greenland by viking Erik the Red?