Warm reminder: the cat toys powered by 2 AAA batteries (not included in the package), you can find these batteries easily in a local store. Perfect Interactive Cat Toys: It is a great interactive toy for your lovely cats & dogs, to make the animal more exciting during training and for stimul further his interests. It will provide endless fun and exercise for your pet. Portable design: mini size and easy to carry, easily put these toys interactives in your pocket or bag, use anytime and anywhere for convenience. Multicolor: 3 colors (green, red, blue), can be used as an interactive pet toy for cat dog training, exercise and entertainment, it can improve the exercise of pets.