When children start going out, they come across children of different age groups. Some of them meet more frequently and become friend also. Soon they are in one group and spend more time together. This group and children in that group start exchanging their own behavioural traits. Hence development of children in this social aspect is govern by the behaviour of children in their friend circle or this group. How should we monitor this group. If there are elder children in this group then younger children may come across habits which yet they can not differentiate whether good or bad. They may just fall in the trap. There is also other side of it, children may get some good habits from elder ones. But definitely there is trade off. Should we allow our children to mix with children of different age group? What impact this will cause in over all social development of children?