Paint on Elephants
Paint elephants, and enjoy the curiosity about their behavior.
However, we had not seen their behavior in response to such identity-stimulating experiences as being colored differently.
People use clothes, and it plays a role in socializing. An experiment on coloring a group of elephants each with a different color, or a pattern, would be quite interesting, and might reveal things about their social manners and preferences, and further explore animal intelligence. Give human artists a gist about painting on elephants, and something interesting might happen.
This may be useful as a method for animal intelligence research.