Elderly people, who had parenting long time ago, remember those busy, peaceful and heart warming days, and discover stable mind and encourage active communication. Moving sensor: "Hello Baby" can recognize if they are lay down or stand and show different actions. Listening sensor: "Hello Baby" can hear what you say and response with various expression. Self-learning: By repeatedly moving and speaking with "Hello Baby," they grow up little by little. It is like 10 months baby grows up to 14 months'.