Answer:
I am the reaction after enjoying soda.
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
I hop around and deliver eggs at Easter.
I travel in a gaggle.
I love to twist and dance. Though wingless, I fly high up into the sky. What am I?
No matter how little or how much you use me, you change me every month.