Bring STEM engineering challenges to your class. This is a bundle of all my best sellers! Balloons over Broadway STEM, Reindeer Stem, Snowman STEM, Hot Chocolate STEM, and Leprachaun Trap STEM.These STEM challenges are perfect for kindergarten, first-grade, and second-grade engineers working together or alone in science and building centers This resource uses the engineering design process to solve problems all fall, winter, and spring. Your kids will have fun building and designing tools and st