Ever heard of how walnuts are good for the brain? It certainly seems plausible when you meet Walnut Cookie, the famed little detective! Using her extensive knowledge of detective novels, there's no case this expert sleuth can't solve! Always on the hunt for a case, her persistence and instinct for finding answers are invaluable. Other Cookies can't help but allow her to investigate a scene when she requests permission in her signature cute and polite manner. No clue goes undetected by her