Answer:
An office supply that's shaped like a trombone.
What kind of cup has holes in it when it is new, is designed to withstand a heavy beating and should never be used for drinking?
What becomes too young the longer it exists?
What can go up a chimney down, but cannot go down a chimney up?
What five-letter word becomes shorter when you add two letters to it?
What made Cyclops quit teaching?