Answer:
What goes in the water black and comes out red?
I am round. I have only one line. Circle is not my name indeed. What am I?
What five-letter word becomes shorter when you add two letters to 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?
I smell like blue paint pours like green paint and I look like a red truck.
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls