The MAM Twister Teether was designed in conjunction with child development specialists to ease teething troubles as well as fostering your baby"s active perception skills and training the senses. The teether"s bright colours help sharpen vision. Twisting the rings and feeling the fine structures trains coordination and movement and develops the sense of touch. The sound of the rattle sharpens hearing. The cooling and chewing surfaces offer a variety of textures to cool and soothe painful front and back gums. Recommended from six months of age. The Twister Teether is free from BPA, phthalate and PVC.