You could use the cardboard box as a model child labor factory, while using the markers and paper to draw children. You can cut them out and place them in the factory like pop-ups. Then you can add some captions explaining what you need to. Just make sure the cardboard factory and children portray the negatives. I hope this helps.
Hello. Before doing this, I waited a while to see if anyone else was going to answer, but no one did... Sooo, I answered so Mqianyue could get brainliest! Their idea was super creative! Absolutely excellent! Great job you definitely deserve brainliest answer! :) Good luck on your visual display project Tesy! :) Have a great day!