Answer:
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
What travels from house to house and is sometimes narrow and sometimes wide but always stays outside?
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you.
What's a place you have left but didn't enter?
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?