Answer:
It is a form of plastic money.
What has a foot but no leg?
Angels and pilots earn these.
It makes me warm and secure.
The day is their night and the night is their day, when I shout and they shout back I run away.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?