Social inclusion is an emerging preoccupation in the science communication field. The political value of science communication (e.g. in terms of empowerment) and the necessity to address all audiences has always been considered, but in recent times the participation agenda has enriched the rationale and methodologies of the communication of science: social inclusion is not only an issue of access to knowledge, but also of governance and co-production.

In a meta-analysis carried out in 2002, the two main associations of science centres and museums (ASTC, mainly US-centered, and ECSITE, mainly European) gathered all studies analysing the impact of science centres and museums on their local communities1. Four types of impact were identified: personal, social, political and economical. It was noticed that the vast majority of studies concentrated on the personal impact (that is, learning outcome, visitor satisfaction, etc.), while the latter three were largely neglected. The very fact of pointing this out, and many recent experiences - some of which are included in this commentary - show that there is now a shift of attention.

The international symposium "Science on air: the role of radio in science communication" was held in Trieste on 1 and 2 October, 2004. To our knowledge, it is the first conference ever specifically held on science on radio, and it is certainly the first time science radio journalists, researchers, and media experts from 16 different countries met to discuss their journalistic practice and the role of radio in science communication. The main results are presented in this article.

In the editorial of this issue of JCOM, we underline how children are on one hand one of the main target group for science communication, and on the other hand a largely excluded group in the shift from a linear diffusion model to a dialogic model of science communication. In this series of comments, stimulated by the EU - FP7-Science in society project `SiS-Catalyst - 2013 children as change agents for science in society' (a four year programme aimed at crossing the science in society and the social inclusion agendas), we would like to explore methods and approaches that can ensure that, in science communication contexts, children can be listened to, that they are given the chance to express their view, and that they can be empowered in building their own relationship with science, and thus a sense of ownership for scientific knowledge.

Many science communication activities identify children as their main target. There are several reasons for this, even if, quite often, they are not expressed explicitly, as if children were a somehow “natural” public for science. On the contrary, we can observe a high level of complexity in the children agenda to engage with science, and in the science institution agendas for targeting children. But this does not seem to be followed but the same level of complexity in devising science engagement activities for children. The profound transformation of the scope and understanding of science communication that we have observed in recent years, in which keywords as dialogue, participation and empowerment have become essential, has only partially touched the younger public, which remains in most cases considered as a spectator for science.