This paper reports on a study in the area of informal science education in the contexts of science museums. The research focused upon two areas: first, perceived novelty and its effect on cognitive leahaing in year eight students visiting an interactive science museum; second, the links between exhibits which were most frequently recalled and exhibits which students later recalled as being interesting and.puzzling. Results on a post-test of cognitive learning of concepts and principles associated with the exhibits suggested that students who underwent novelty reducing pre-orientation to the physical environment and had prior visitation experience learned more than their counterparts. Gender did not influence learning when perceived novelty level and prior exposure were considered. Furthermore, the most frequently recalled exhibits shared a combination of characteristics such as large physical size, prominence in the exhibit galleries, and the diversity of sensory modes that they employed. Finally, it appears that cognitive learning is likely to occur for exhibits which are most memorable.Millions of people throughout the world visit informal learning facilities such as zoos, aquariums, botanical gardens, and science centres for the purpose of recreation or as participants in a school field trip. These purposes may appear to be inconsistent, as pointed out by Rennie and McClafferty (1996), entertainment and education placing different demands on such facilities in relation to the nature of exhibits, context in which they are displayed, and the role of members of staff. In particular, as numerous researchers have noted (Lucas, 1983;Rennie & McClafferty, 1996;Tunnicliffe, 1996), hands-on engagement with an exhibit is no guarantee that an individual has engaged intellectually or perceives the experience as one from which learning about a scientific concept or principle could result.