Like New SmartNoggin Noggin Stik Baby Rattle Developmental Light Up Toy. Ideal from Birth and older. The NogginStik Light Up Rattle encourages baby’s early milestones and guides parents & caregivers through activities and interactions that will help promote healthy brain development and bonding beginning day one. It lights up red, blue, and green to encourage visual tracking, has a soft rattle sound to please the ears, an easy to hold handle for mastering grasping and fun textures to delight the sense of touch. The NogginStik developmental light-up rattle is baby’s first learning toy! BPA-Free, PVC, Lead & Phthalate Free. Fun textures promote tactile interest. Encourages baby’s first STEM skills; cause and effect, observation and predicting outcomes. The underside of this rattle features a mirrored surface, which promotes eye-hand coordination and imitation skills. A mirror is a toy that a baby can explore all on their own. In addition to fostering cognitive skills, mirrors can help babies learn self awareness. Unscrew back of red “head” to install 3 LR44 to make item operate properly