Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?
I go up and never come down no matter how hard you wish. As I get higher more wrinkles crawl onto your face.
Railroad Crossing, look out for the cars. Can you spell that, without any R's?
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