Answer:
The older they are the less wrinkles they have.
They can float and tickle, but their sound is rarely heard unless you're a pillow or bird. What are they?
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.
Give it food and it will live, give it water and it will die.
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.