The correct order is:
Infancy - newborn to 1 1/2 yrs old.
Toddler hood - 2yrs old.
Early childhood - 3yrs old - 5yrs old.
Middle childhood - 6yrs - 11 yrs old.
Adolescence - 12yrs to 19yrs old.
Early adulthood - 20yrs - mid 30's.
Middle adulthood - late 30's - mid sixties.
Late adulthood - late 60s and upwards until death.