Answer:
I travel in a gaggle.
I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each.
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
I am the only thing that place today before yesterday. (one word)
What five-letter word becomes shorter when you add two letters to it?
A little house full of meat, no door to go in and eat.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic