“In fact, our brains are most active, and hungriest, in the first few years of life. Even as adults, our brains use a lot of energy: when you just sit still, about 20 percent of your calories go to your brain. One-year-olds use much more than that, and by four, fully 66 percent of calories go to the brain, more than at any other period of development. In fact, the physical growth of children slows down in early childhood to compensate for the explosive activity of their brains.”