Did you know rats are very smart and curious creatures? They laugh when they are tickled, they can take care of each other, and they are actually quite clean. Millions of them are also used in painful scientific experiments to test new drugs and medical theories. Researchers do all this to help humans. But some say these animals deserve a better life. So, what should we do?

• Brains Trust – Linden Park Primary School, Adelaide – Linda, Elina, Jescinta, Dhyana, Siera, Justine