Product information: Ability Training: Other ability training Color: default Specifications: Classic models (need to be installed by yourself) do not generate electricity, do not install basic models to generate electricity and play it when you get it, red wooden baseboard to play when you get it, FY black wooden baseboard to play when you get it, FY Golden wooden bottom plate can be used to generate electricity, while wooden bottom plate can be used to generate electricity. Double-cylinder balance can be used to generate electricity, double-cylinder balance can be used to generate electricity, and double-cylinder balance can be used to generate electricity. Temperature difference machine (Steam) Applicable age: infant (0-2 years old) Toy material: Metal Packing list: Stirling Engine kit 1 Product Image: