Answer:
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes. What am I?
I fill a room but take no space.
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
Everyone has me and no one can lose me. What am I?
I have been the beginning of ideas for all time yet I am just one simple small object the things that you can use me for can be frustrating and also I can be pretty. I have some of the most valuable thing in the world on me yet almost everyone owns me.
What made Cyclops quit teaching?