Answer:
Once you know it exists, it no longer exists. What is it?
A tower at the root of all confusion.
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
What is red, bloody and smells like an orange?
Two year-old children who throw tantrums get this nickname. So did the tsar "Ivan."
Break me and I am better immediately set and harder to be broken again.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?