MobiLLab is a mobile science education program designed to awaken young people’s interest in science and technology (S&T). Perceived novelty, or unfamiliarity, has been shown to affect pupils’ educational outcomes at similar out-of-school learning places (OSLePs) such as museums and science centers. A study involved 215 mobiLLab pupils who responded to three surveys: a pre-preparation, at-visit, and post-visit survey. Results provide evidence for four dimensions of pupils’ at-visit novelty: curiosity, exploratory behavior, oriented feeling, and cognitive load. Findings also show that classroom