Answer:
What do you have when you're sitting down that you don't have when you're standing up?
There are several different kinds, but the one you pick doesn't do its job. What is it?
There are millions of me. I am very small but when moving fast I am deadly.
Although my cow is dead, I still beat her. What a racket she makes!
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.
I have two bodies joined together as one. When standing still I run and run.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?