Beginning Saturday, May 6, Microsoft Store locations across the United States, Canada, Puerto Rico and Australia will host STEM Saturdays throughout May in all full-line locations, in addition to the range of free programs year-round that empower students and educators. STEM Saturdays bring pop-up classrooms to Microsoft Store and offer hands-on experiences like building a sensor that measures the flexion and extension of a finger to learn about the anatomy of a human hand.