Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
I’m white; perfect for cutting & grinding. For most animals I am a useful tool.
I have Eighty-eight keys but cannot open a single door.
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
What can you catch but not throw?
What’s a carpet’s favorite sport?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic