This is a cool kit to teach children about the environment and renewable energy sources, Power House: Sustainable Living in the 21st Century Science Kit.

• Build a model of the ultimate “green” house ? energy efficient and self-sustaining
• Complete house kit includes windmill, greenhouse and desalination system
• Includes more than 70 experiments and 20 building projects
• Build and operate an electric train, solar cooker, solar hot water tank, electric motor, sail car and more
• Includes 96-page illustrated experiment book

You can buy the Power House kit from Amazon for $149.95, found via Boing Boing.