Answer:
Of these things - I have two. One for me - and one for you. And when you ask about the price I simply smile and nod twice.
I will disappear every time you say my name. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
Soft, hairy, from door to door. I am the pet that always stays on the floor. What am I?
What made Cyclops quit teaching?