1Practical Use: Manual operation, you can observe the entire running process of the Stirling engine, understand the Stirling principle more intuitively, and broaden the interest in learning physics. 2Multi Purpose: Mini engine kit can be used as a demonstration prop for physics and machinery learning, and it is also an exquisite high end gift for children and friends. 3Compact Structure: Stirling generator is small in size, compact in structure design, exquisite appearance, beautiful and textured, and does not take up space for storage. 4Fine Workmanship: Stirling engine is finely polished, the surfaces are very smoother and shiny, and the color is bright, not easy to rust and discolor, and has a high end texture. 5Easy to Use: The product itself has been assembled and can be used directly. Its excellent quality and exquisite appearance also make it have a high collection value and can be used as a high end gift.