Computer and multimedia technology play an increasingly important role in education. However, current educational multimedia systems suffer from a major drawback that they don?t support active engagement from users. In this paper we present a system that overcomes the hurdle. Our system offers rich user interactivity; it naturally supports and invites user involvement in a multimedia presentation. In the paper we first categorize the different levels of user interactivity that we deem vital for an interactive multimedia system, and then we describe a system design that enables active engagement.