This age-appropriate Ultimate Inventor Toolkits encourage children to explore a wide variety of engineering concepts and solve real-world problems. The teacher-developed project guide and extensive supply of building materials provide hours of open-ended exploration. The reusable storage box can also be used to store a child's creations. Details: Open-ended exploration appeals to each child's unique needs Building challenges promote creative and innovative problem solving For ages 8 and up Contents: 250+ building materials 10 building challenges 1 activity guide