Answer:
You can see nothing else, When you look in my face, I will look you in the eye, And I will never lie.
What is lighter than what it is made of?
A little house full of meat, no door to go in and eat.
What can be heard and caught but never seen?
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What has wheels and flies but is not an aircraft?