Answer:
Sometimes you feel it weigh a ton. Yet it is nothing, but somehow still there. Makes you uncomfortable around anyone, But speak its name and it's gone.
What can't you see, hear or feel, until it’s too late. What shadows love, and shopkeepers hate?
What has no hands but might knock on your door, and if it does you better open up?
What time is spelled the same forwards and backwards?
What travels around the world without leaving the corner?
It is something you will never see again.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?