Answer:
When it comes to me, you go on red and stop on green. What am I?
I am pronounced as one letter written with three. I come in blue black brown or grey. Reverse me and I read the same either way.
I am a kind of coat that can only be put on when wet.
I no longer have eyes, but once I did see. Once I had thoughts, but now Iām white and empty. What am I?
I have an eye but cannot see. I am fast but I have no limbs. What am I?
I build up castles. I tear down mountains. I make some men blind. I help others to see.