Ensure hours of learning and fun with the STEM Explorers Bridge Builders classroom set form Learning Resources. FEATURES: 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., Students design, construct, and test their own bridges and towers as they solve this STEM building toy’s STEM challenges!, 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, As they test and tweak their designs, students will also use this STEM building toy to build essential critical thinking and problem-solving skills, Includes 5 full STEM Explorers Bridge Builders sets in a reusable storage tub. WHAT'S INCLUDED: 20 yellow bases, 20 blue bases, 120 #1 gray rods, 40 #2 gray rods, 40 6-point connectors, 16 strings, 41 double-sided STEM challenge cards, 8 arch connectors. DETAILS: Age: 5 years & up, 8.8" x 15.1" x 11.7", Weight: 2 lbs., Plastic, paper, Wipe clean, Imported, Model no. LER9464. Size: One Size. Color: Multi. Gender: unisex. Material: NONE.