Our age appropriate tool kit encourages 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. Open-ended exploration appeals to each child's unique needs. Building challenges promote creative and innovative problem solving. Includes: 250+ building materials, 10 building challenges, and 1 activity guide.