Answer:
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
Watches students at the prom to make sure there's no funny business.
What goes through a door but never goes in and never comes out?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
What can be seen but not touched?
What is full of holes but still holds water
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?