For the development of the soul requires the development of the mind
Children at this age are different receptive, open attitude towards the world. Allowing them to be mutable and able to learn and absorb new things.
But this is their weakness and vulnerability, as such openness and the ability to recognize what is bad and what can lead them to situations where they are not guided by who you can trust.
What determines the individual's self-esteem. Why one person can say that he is stupid, and he didn't even pay attention to it, shake off, as the dust from your shoes and go on.
And, for another, it would be so painful to hear that he will be offended, will close and even revenge to whoever about it is said.
Praise can become a powerful incentive for action.