Answer:
What goes into the water black and comes out red?
I build up castles. I tear down mountains. I make some men blind, but I help others to see. What am I?
What can you break even if you never touch it?
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
What goes up a chimney down but can't go down a chimney up?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.