How old are you when you become a tween?

According to the dictionary a tween are people who are to young to be a teen yet to old to be a child. If you are either 11 or 12, you are a tween.

Demographics:

Infant (0-1)

Toddler (1-2)

Pre-schooler (3-5)

Child (6-10)

Tween (tweenager)(11-12)

Teen (13-19)

Young adult (20-26)