This giant eyeballs blink in a very realistic manner and can be attached just about anywhere using the included suction cups and hooks. An infrared signal between the eyes helps the shutter mechanism to function in perfect sync. Each eyeball is around 3 inches wide and 2 inches deep. The only other requirement is six AAA size batteries which need to be purchased separately. The kit also includes decoration sheets, hooks and cups for suction. The decorating sheets may be used to give tears or eyebrows to your blinking eyeballs thus letting you give different emotions to the surface they are attached to. The electronic blinking eyeballs will not only impress young children, but it can also bring a new life to almost any object in your home, from cupboards to your workstation.