Answer:
What goes through a door but never goes in and never comes out?
Everybody's got one.
It's what light turns into in the night
What two letters in the alphabet say goodbye?
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
It is something you will never see again.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?