Starting from a referent from 1911, this is one of Lewis Hine's photographs that served to bring to light the enormous scourge of child labor in the early 20th century.

When the children play

“When the children play

And I hear them play,

something in my soul

Begins to rejoice.

And all that childhood

That I didn't have comes to me,

in a wave of joy

That belonged to no one.

If who I was is an enigma,

And who will I be a vision,

who I am at least feel

This in the heart.”

by Fernando Pessoa