Hartz Just for Cats Midnight Crazies Cat Toys are the perfect toy to keep your cat stimulated and entertained nbspThis assortment of balls each contain jingle bells to create noise that will entice your cat to play and keep them delighted Each Midnight Crazies pack comes with 7 jingle balls in assorted vibrant colors with small jingle bells inside each ball that come in a red and white pattern Hartz Midnight Crazies allow cats to explore their natural instincts.