Answer:
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
I am an activity dogs are very good at when a ball is thrown.
The more of this there is the less you see. What is it?
I have six faces but not even one body connected 21 eyes in total but cannot see.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
I am the kind of an ant that's good at math. What am I?