Encourage children to explore a wide variety of engineering concepts and solve real-world problems with these age-appropriate toolkits. Teacher-developed Getting Started Guide and extensive supply of building materials provide hours of open-ended exploration. STEM TOYS FOR ENGINEERING: This toolkit focuses on the engineering component of STEM (science, technology, engineering, mathematics). ULTIMATE INVENTOR SCIENCE KIT SUPPLIES: Each Toolkit comes with 250+ building materials, 10 building challenges and an activity guide. MODEL KIT BUILDING CHALLENGES: The Ultimate Inventor Toolkit's building challenges promote creative and innovative problem solving as they create. STEM KITS FOR KIDS: Our age-appropriate Ultimate Inventor Toolkits encourage children to explore a wide variety of engineering concepts and solve real-world problems. BUILDING GUIDE AND BEYOND: Along with the challenges provided, students can invent and build their own masterpieces!