Crawlers
Infants
6 weeks - 12 months
Climbers
Ones
12 months - 24 months
Walkers
Twos
24 months - 36 months

Explorers
Threes
36 months - 48 months
Creators
Pre-K
4 years old - 5 years old
Infants
6 weeks - 12 months
Ones
12 months - 24 months
Twos
24 months - 36 months
Threes
36 months - 48 months
Pre-K
4 years old - 5 years old