Answer:
What can run but canβt walk?
What can go through glass without breaking it?
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
What word is a plural, but when you add an "S" to the end, it becomes singular?
What is as big as you are and yet does not weight anything?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?