Food grade materials: you can put it in your mouth, your health is our top priority.SMOOTH CORNERS AND SIDES - This product has smooth edges and edges to avoid poking babys little hands.Baby can touch and play, no worry about injury.SOUNDING RECOMMENDED Hearing Strength: This pendulum has a sound sound and a fun sound every time you sway.Babies can listen to this sound and listen to their hearing.Interested in changing sounds and rhythm, it can develop babys hearing.BRILLIANT COLOR ENVELOPS YOUR VISION: This pendulum is decorated with vibrant colors to promote your babys visionThe bright colors will attract babys attention and provide visual stimulation.Babies learn to explore and identify colors.