It is Saturday evening at the state fair. To your left, "Rock around the Clock" wafts out of a tent. Behind you, a group of teenagers is carrying on, laughing loudly. Somewhere, an infant is crying. A profusion of neon signs and blinking lights competes for your attention. A roller coaster plummets and makes a hairpin curve. Your senses are already overloaded. But the experience wouldn't be complete without an ice-cream cone in hand and the aroma of cotton candy and honey-roasted almonds in the air.