In this interactive session, many speakers briefly present examples of competitions they have run. Speakers and audience then engage in a live discussion involving reflection, philosophy and physical movement. Everyone is invited to propose their own issue and state their opinion: which target groups are best reached through competition? Which tools or media should be employed? Are science centres moving out of their comfort zone to understand the needs of publics, or just following a trend? How far can competitions go to reach new publics and engage them in communication from an early stage?