Friendships in childhood are usually a matter of chance, whereas in adolescence they are most often a matter of choice.
David ElkindChildren in the 21st (century) have been transformed from net producers of their own toy and play culture, to net consumers of play culture imposed by adults.
David ElkindDecades of research has shown that play is crucial to physical, intellectual, and social-emotiona l development at all ages. This is especially true of the purest form of play: the unstructured, self-motivated, imaginative, independent kind, where children initiate their own games and even invent their own rules.
David Elkind