3 months & up. Infants will strengthen and refine their fine motor skills, hearing and eye sight as they play with these Chew Cubes™ Teether Rattle - Set of 3! The geometric design makes gripping easy as they shake the cube around or hold for teething. Rattle sounds in the cube along with the black and white designs will provide an extra layer of brain stimulation as infants play and chew. The cubes are made with 100% food grade silicone and are BPA and phthalate free. Cubes can be hand washed with dish soap and a wet cloth then air dried. Colors may vary.