Answer:
Different lights do make me strange, thus into different sizes I will change
I am free for the taking. Through all of your life, though given but once at birth. I am less than nothing in weight, but will fell the strongest of you if held.
What can be swallowed, but can swallow you?
I'm a type of pizza that is folded in half before cooking to contain a filling
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
A doctor might remove one from the neck of a Dracula victim.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?