Answer:
I open to close but I close to open. I'm surrounded by water but I'm never soaking. 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?
Golden treasure I contain guarded by hundreds and thousands. Stored in a labyrinth where no man walks Yet men come often to seize my gold. By smoke I am overcome and robbed then left to build my treasure anew.
What can you catch but not throw?
I row quickly with four oars but never comes out from under my own roof.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.