You go talk to kindergartners or first-grade kids, you find a class full of science enthusiasts.
They ask deep questions. They ask, "What is a dream, why do we have toes, why is the moon round, what is the birthday of the world, why is grass green?" These are profound, important questions that just bubble right out of them.
You go talk to 12th graders and there is none of that. They have become incurious. Something terrible has happened between kindergarten and 12th grade.