I am not a child psychologist, nor am I too sure of the context.
The English is not so good, the translation will also be bad. This is ambiguous:
there are 40 building blocks every child needs to grow and mature.
A child can grow and mature, a building block cannot 'grow and mature', nor can a child 'grow and mature' building blocks. But, yes, every child must needs 'grow and mature.' (Some just get bigger! :))
Possibly, you mean:
There are 40 (personality) building blocks every child needs to acquire in order to grow and mature.
There are forty personality factors every child needs to acquire in order to grow and mature.
The more of these personality building blocks a child has in her life,
the more likely she is to behave in a socially acceptable way,
and not indulge in improper behaviour.