Augmented reality has the potential to transform and enrich Natural Sciences education. This is particularly true in preschool and primary education. This study aims to provide a literature review regarding the use of augmented reality in preschool and primary education to teach and learn Natural Sciences, Astronomy, Biology, Chemistry, Earth and Environmental sciences, and Physics. A total of 63 related studies are examined. Based on the results, augmented reality emerged as a valuable and effective educational tool that can improve teaching and learning of Natural Sciences and its branches (e.g., Astronomy, Biology, Chemistry, Earth and Environmental sciences, and Physics) in kindergarten and elementary schools. Students, teachers, and parents expressed positive attitudes and emotions about the use of augmented reality in education. Students that learned through augmented reality applications achieved better learning outcomes than those who learned through traditional means and methods. Specifically, augmented reality helped students acquire a deeper understanding of the concepts taught, improved their self-learning, and increased their engagement, motivation, comprehension, flow, and academic performance. Augmented reality can also help teachers provide lessons of high quality. Moreover, the ability of augmented reality to support both formal and informal learning was evident. Augmented reality also effectively supported collaborative learning, scaffolding, and experiential learning and enabled students to communicate and interact with their peers, surrounding environment, and digital content. Finally, augmented reality arose as an educational means that can improve students' ecological empathy as well as environmental consciousness and awareness. Based on the findings, implications and future research directions are provided.