Birth & up. Made with your fussy baby in mind, this teether is a dream! The natural wood design and silicone textures on the teether are safe. The shape makes the teether easy to grasp. Multiple textures develop sensory and motor skills. Ideal for freezing to assist in soothing sore gums. The silicone on the teether is hypoallergenic and healthy. Includes 4 teethers.