Answer:
I start new then become old. Start clean but be one dirty. I usually start big then become little.
I am the reaction after enjoying soda.
You used to come to me for all sorts of information and knowledge before the internet was born
Use me to reward good behavior.
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure, a matter of course. What am I?
The answer I give is yes, but what I mean is no. What was the question?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic