Answer:
You heard me before, yet you hear me again, then I die. Until you call me again.
What type of paper can you neither read nor write on?
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
When I get closer my tail grows longer, but when I go away my tail leads the way.
It happens when something has been cut with H2O.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?