Answer:
I help engines spin and pants stay up.
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
I have a little house in which I live all alone. My house has no doors or windows and if I want to go out I must break through the wall.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
What goes up but never comes down?
I flow from the Homer’s mouth when he sees doughnuts.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic