For even the youngest babies, these two Pods provide tummy-time fun with glowing lights and basic musical tones that help stimulate senses. Sitting babies can bat each pod to hear music and layer on the beat. They ll quickly discover that the music and lights increase as they transition from mode one to modes two and three. When baby s crawling, the lights and music encourage chase-after fun. Place the pods in different spots to entice baby to crawl back and forth between them - the lights and music "magically" transfer from pod to pod, encouraging baby to go-go-go!.