Features -Color:Yellow -Material:Aluminum plastic -Size:10.20X3.60X3.20cm/4.01X1.41X1.26in - Made of materials this product is durable easy to use and can be used for a long time. - A clear sweet sound will put your baby in a good mood and bring more fun. - Smooth surface safe and friendly for baby skin. - Helps your child develop good habits and interests. - Very interesting and creative to develop the baby s sense of rhythm and music.