Answer:
I am a tool for fairies.
What is black when you buy it, red when you use it, and gray when you throw it away?
I am needed for most animals and hardcover books. What am I?
I am black within and red without; with four corners round about. What am I?
I am a key that is playful. What am I?
I will disappear every time you say my name.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic