Answer:
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
These are the bumpy parts of your digits
What two letters in the alphabet say goodbye?
It is a form of plastic money.
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
It is something you will never see again.
Easy
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?