Quick Response (QR) code technology plays an important role in scaffolding the child user’s active learning in informal environments. This study examines the impact of mobile phones and QR codes on two informal learning outcomes: increased interest and greater knowledge understanding. Ninety-one children and their families participated in the study as part of the iQ Zoo Project. Qualitative findings suggest that most children’s interest in learning about animals was either maintained or increased as a result of the experience. Quantitative results reveal that QR Code Technology was effective in promoting knowledge gains, especially on subjects that are challenging for the informal learner.