Safe soft rubber bite material; Built-in smile ball vibration and rattle; great for fun with babies Can rock up and down or bite; Colorful rattle toys and crisp bells stimulate children's visual and auditory nerves; At the same time teach babies to recognize colors; Physical coordination and motor function - through grasping; pinching; shaking play activities; training baby's hand-eye coordination; grasping ability and skin feel. Specification: Color: random color Material: environmentally friendly plastic Size: see picture for details