Answer:
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
What is round, has a twin, and sees more than most?
I'm a small sweet cake, typically round, flat, and crisp. I come in a variety of flavors from chocolate chip to oatmeal raisin.
What kind of a nut has a hole?
I ate one and threw away two