It's time we "Unlock their bright future" is the whole Moto behind the hoarding above. 

The world is going to be a cruelest place in the following years if we do not stop Child Slavery. With an attempt to create awareness about it, here is a hoarding which explains how children are locked up and restricted to do a certain kind of work/job because of their poor family background and circumstances. Childhood days are the ones wherein we learn, play, grow, educate, and flourish in safety. Yet, about 10 million children in the world don't get that. This hoarding is an attempt to directly target the people to just STOP this particular cruel act and let them live their lives the way they actually are supposed to live, i.e; let them be free and independent. Because, in the end, their bright and secure future is in our hands. 

The hoarding is black in color to highlight more on the darkness of this serious issue while the text there is in a simple font with minimal content highlighting more on "STOP" hence the color red. 

The text in this hoarding is minimal because if a person is travelling by his/her vehicle the attention span of them while passing by this particular hoarding is going to be of about 3 seconds. Hence, during these few seconds a person should be able to read the right message. 

Also, the image besides the text is so powerful that the message reaches directly to a larger audience.