The priority is for the adults to grow as persons.

The personal growth of these children depend a lot on the care that we adults take as regards our own person.

In order to influence (positively or negatively) these children it's not necessary that we set out to do this, our very presence is the important thing. In fact, when least we think the children are listening, observing, and imitating us. It is not as much our advice as our profound attitudes that leave its mark on them. There isn't a time when we aren't teachers, and another when we are free from this responsibility… "All" (small or big, good or bad, implicit or explicit, before or after) that doesn't have its effect on the children, all that we are end up contributing to the formation of its mentality, its character, and finally his/her future disposition.
Sir, what is your wish?
The children have an extra sense, they smell out the real intentions of the adult that has come to work in their midst.

Go to the whole world preaching the good news to all creatures.
Yes, the real value of the choices that we make depend on the profound reasons of our motivations. For this reason we need adults that opt for this service not out of necessity, to feel useful or out of simple humanitarian motives... it's more to do with the living out of a full life, the assimilation of the spirit of the Gospels, that is gratuitous love.
To help adults to embark on this journey it is indispensable to give of yourself completely to the task, in this adventure of personal change. If we mature it is because we are in solidarity and at one with the other.