In this project, the team will develop a prototype of an augmented reality (AR) sandbox with foundational learning experiences in engineering and computer science for students in kindergarten to grade 2. The prototype will embed puzzle challenges within the AR interface to facilitate experiences that will mirror traditional real-world play-building activities. At the end of Phase I, in a pilot study in three classrooms, the researchers will examine whether the prototype functions as planned, whether the AR sandbox is engaging for students, and if the prototype shows promise for improving student learning outcomes in engineering and computer science.