An exhibition is a set of exhibits wherein the visitor walks through, touching nd experiencing one after the other. From time to time, however, our visitors like like to have real person-to-person contact. The visitor wants to talk, demonstrate their ability, participate in a group, compete or be recognized or distinguished. Do we want to offer visitors these opportunities in our exhibitions? Some science centres do it. Let’s exchange our best practices. and determinethe pros and cons for events that can enliven our exhibitions.