The Learning Journey On The Go Activity Set With their own set of keys and smart phone, your toddler will be ready to go! On the Go Activity Set's keys and phone have buttons that react with sounds and lights, teethers and other sensory activities that will stimulate your little one's senses and keep them entertained Winner Creative Child Award Top Travel Fun of the Year 2014 Requires 3 button cell batteries (included) For ages 3 months and up Pre-programmed melodies Light-up LED with Rattle Beads Introduces the world of music Sensory activities Stimulates tactile/motor skills