Age of adolescence:
Infants (0 to 1 year old)
Toddlers (1 to 3 years old)
Preschoolers (3 to 6 years old)
School-aged children (6 to 12 years old)
Adolescents (12 to 19 years old).
10-14 years
14-20 years
6-10 years
1-3 years