This study will be investigating an innovative and exciting way to increase physical activity in children between the ages of 9 and 12 years old. Families will be provided with a state-of-the-art exercise bike and video game console to have in their homes. The video games will provide a variety of play including racing, puzzle solving, collaborative play, team play and competitive play. We will be comparing whether a 'multi-player' condition has a greater adherence compared to a 'single-player' condition.