The mechanism behind this interactive game is to use an avatar, kangaroo character, to imitate the user’s movement simultaneously. We use jumping rope and two jumping pads as the game console. When the user is jumping with a jumping rope, the kangaroo in the video game will jump from stairs to stairs. When the user presses the button in the rope handle, the kangaroo could hit stones away. The concept of this design is to make jumping rope exercise a more diverting and gameful user experience and invoke children's passion for keeping exercising and becoming healthier.