Solve STEM Challenges: Students design, construct, and test their own bridges and towers as they solve this STEM building toy’s STEM challenges! Inspired By Real-World Engineering: From suspension bridges to beam bridges and every structure in between, this STEM kit’s challenges introduce students to the fundamental principles of structural engineering. Build Critical Thinking Skills: As they test and tweak their designs, students will also use this STEM building toy to build essential critical thinking and problem-solving skills. Ready for the Classroom: This expanded classroom version of our Toy of the Year nominee helps students strengthen collaboration skills through STEM building challenges! Bridges and towers for the entire class! Kids work together to design, test, and tweak bridges inspired by real-world structural engineering principles, building new skills in collaboration along the way. Includes 5 full STEM Explorers Bridge Builders sets in a reusable storage tub. What's in the box? 264 construction pieces, 41 double-sided activity cards and Activity Guide