Best riddles for teens

My best buddy always makes mistakes. But I would easily get rid of the mistakes. What Am I?

An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes. What is it?

Find words to fit the clues, all the words end in the same three letters. _ _ _ _ _ _ Eat quickly _ _ _ _ _ _ Unverified story _ _ _ _ _ _ _ An outline

In medieval England, a king's jester was imprisoned (the king didn't like the jester's jokes). The jester was locked in a room at the top of a high tower. The room had only one tiny window. The jester found a piece of rope. It wasn't long enough to reach the ground. So, he divided it in half and tied the two halves together. This made the rope long enough and he escaped. How?

A number of people have broken the sound barrier, either in a super-fast car, or in nice fancy planes. However, hundreds of years ago it was broken on horseback. How?

I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?

Why does the sea twinkle?

To you, rude would I never be, Though I flag my tongue for all to see. What am I?

I am pronounced as a one letter alphabet. I am written with three letters. I am complete with just two letters. I am double. I am blue I am black I am brown I am gray I am yellow and I am green. I can read from both ends. I appear the same every way! What am I?

What do you call two birds in love?