Answer:
What is the building that you leave without ever having entered.
When you put this in a heavy wooden box the box will become lighter
How do you discover something that does not exist?
What can you fill a room with that takes up no space?
First I threw away the outside and cooked the inside then I ate the outside and threw away the inside. What did I eat?
I start with T end with T and within me is T.
Logic
Animal
Difficult
Easy
Food
Funny
Kids
What am I?