• Sun light energy vanes:light pressure windmill is a very solar scientific experiment equipment
• Ideal for use in education, research, solar energy, and all of science
• The stronger the light, the faster it turns if possible, place it on a window sill or other place with strong light
• It will let US feel the charm of nature, the sunlight, and develop
• This physical and technical miracle shows you in a how sunlight is converted to energy