WMI is founded on a belief which coincide greatly in understanding how important the first 6 years of life could change, form and determine ones personality, character and contribution to society. Investing and creating a strong foundation is consistent with the Montessori pedagogy as the founder, Dr Maria Montessori herself states: 

The human personality is essentially one during the successive stages of its development. Yet, whatever human being we consider, and at whatever age, whether children in the primary school, adolescents, youths or adults, all start by being children, all then grow from childhood to manhood or womanhood without changing the unity of their persons. If the human personality is one at all stages of its development we must conceive of a principle of education which has regard to all stages.
— Maria Montessori, The Formation of Man

Infants : 6 weeks to 18 months

 

Wobblers /Toddlers : 18 months to 3 years old 

Primary : 3 to 6 years old