Quote from : Percy Jackson's Greek Gods Book

The cave floor rumbled. A large stone emerged from the dirt-a smooth, oval rock exactly the same size and weight as a baby god... She wrapped the stone in swaddling clothes and gave the real baby Zeus to the nymphs to take care of... She marched right up to King Cannibal and shouted, "This is the best baby yet! A fine little boy named, uh, Rocky!