Why do u think this movie was called ' All the invisible children'?

Why do u think this movie was called " All the invisible children"?

All the invisible children!

Invisible children!

Is that the reality which is crashing? Is that the reality that we're blind to?
The reality which is invisible for us to see!

Are they the children that we haven't cared to give a thought about?
The Children that were covering under the embellishment?

Answer!

Which is only make more confusion.

So think why ? And Reply plz!