From the Manufacturer
These colorful activity keys are sure to be the key to your baby’s soothing teether needs. The traffic light handle lights up “stop” and “go” when the yellow button is pressed and helps promote visual development. Includes a water-filled key to soothe baby’s gums and colorful sliding beads to shake and rattle and promote baby’s gross motor skills. Each key has various patterned textures for tactile stimulation.
My 6 month old daughter just loves this toy. Easy for her to hold, easy to take on outings. Nice size, not too big and not too small. Perfect for tiny hands. And I like that there is nothing to poke her in the eye like some teethers do b/c of their shape. Nice smooth feel too. The light is cute which my dtr likes to look at when I push it but she mostly likes to mouth it. I washed it up really good with warm soapy water and it has been fine. No smells for us like one of the reviews mentioned. It is brightly colored and much nicer in person.