Answer:
As a state in the USA, I am round on both sides and high in the middle. What am I?
you can throw me away but I will always be coming back
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
In the sun I like to play; in the rain I goes away; walk or run I always follow; in the mud I always wallow.
I am what no man ever yet did see, which never was, but always is to be. What am I?
What language does a billboard speak?