It is 11:30 on an August morning in New York City's Central Park Zoo—breakfast time for the sea lions. A joyful crowd oohs and aahs as trainers put the animals through their paces: catching tossed fish in midair, high-fiving with their flippers, squirting water and torpedoing around the pool. Amid the raucous throng, nine small children watch in wide-eyed silence. When a sea lion zips past at stunning speed, they do not add their voices to the squeals of delight. Some of these children are talking quietly to a camp counselor. Others sit with worried expressions that seem sadly at odds with the scene.