Answer:
What color can you eat?
I can be swallowed, but I can also swallow you. What am I?
What is at the end of a rainbow?
I come with a train and go with a train and the train doesn't need me but can't go without me.
I can never be stolen from you. I am owned by everyone. Some have more some have less.
I am your mother's brother's only brother in law. Who am I?