Answer:
What is round, has a twin, and sees more than most?
A little pool with two layers of wall around it. One white and soft and the other dark and hard, amidst a light brown grassy lawn with an outline of a green grass. What am I?
I'm a food made of flour, water, and yeast or another leavening agent, mixed together and baked. You need me to make a sandwich.
Many people confuse me with a vegetable, but I'm actually a fruit. I'm red when I'm ripe, and I'm sliced and served on burgers.
What has ears but can't hear?
What language does a billboard speak?