In this paper, we describe a ball game "Earthlings Attack!" that uses the contact between users and an active ball device as an information channel to the game content. When the ball device with built-in transmitter comes in contact with the user who wears the receiver, theis system transmits information from the ball device to the receiver through user's body with the human body communication. With this method, we aim at the interaction improvement of the augmentation of the interaction in such a way that presenting information on user's body according to the contact between each ball device and each user. This system also enables to use in a wide range field in the same network by managing contact information of both collectively.