1Multi Purpose: Stirling engine model kit has a wide range of applications, such as children's science projects, holiday gifts, physical machine learning tools, teacher demonstration props in the classroom, etc. 2Multi Color LED: Stirling engine motor toy is equipped with multi color LED, due to the heat of alcohol, the engine will run like crazy and generate electricity, the power will drive the multi color LED light through the wire. 3Durable Material: The bottom plate is made of brushed aluminum alloy, which is exquisite and beautiful; frame is CNC finished; the aluminum alloy flywheel; the connecting rod is made of stainless steel lottomr cutting. 4Simple to Operate: Stirling scientific physical model is durable, fill the burners with 95% alcohol and light it. Let the light burn on the cylinder at the rounded end for about 60 to 120s, push the wheel lightly and it will work. 5Practical Gifts: The stirling engine model is a well designed mechanical toy that nicely demonstrates the fundamentals of an external combustion engine and makes a great gift for family and friends.