Answer:
What word begins and ends with an E, but only has one letter?
What invention lets you look right through a wall?
Deposit red liquid in me.
I have thirteen hearts but no body or soul.
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic