Answer:
What gets whiter the dirtier that it gets?
One time every year, there is a very special day. Little have the same, everyone party a different way.
Taking this from a baby is said to be quite easy.
Small and bearded, both in the real world and in stories.
Shorter than my four siblings, but easily the strongest, Sometimes I wear a funny hat.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?