Come and Check Our Branding Solutions.Our wooden baby rattles are made of quality wood material, which have smooth surfaces and edges, no burr, so they are safe for babies to play, you can choose them with confidence. Promote Auditory Development: these wooden baby toys are connected by five pillars, a metal bell in the middle, so they will make a crisp sound to attract babies' attention when you are shaking or rolling them, which can promote auditory development. Pls check inventory and detailed info before placing your orders.