Answer:
You throw me out when you use me and take me in when you are done. What am I?
I row quickly with four oars but never comes out from under my own roof.
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead. What am I?
Born in the ocean and white as snow. When I fall back to water, I disappear without a trace. What am I?
I am your mother's brother's only brother in law. Who am I?