Sandwich Challenge ā Unplugged Coding Activity Algorithms, Conditionals & Loops | Grades 2ā4Make computer science concepts fun and tangible with this engaging unplugged coding activity! In the Sandwich Challenge, students follow and create step-by-step ārecipesā to build sandwiches while practicing key computational thinking skillsāno devices required. Using familiar food items and clear visual elements, students learn how algorithms, IF/ELSE conditionals, loops (FOR, WHILE), and logical