Features:
Easy to Operate: Just place it on a cup of hot water, and gently flip the wheel until the wheel can run automatically.
Superior Performance: By operating the engine, children would observe and know the operational process and more intuitive understanding of the operating principle of Stirling engine, deepening interest in physics.
A Classic Stirling Engine Model: Made of premium metal, and the high intensity PC material is heat-resistant and harmless. Transparent body gives you a clear view on how every parts work.
Safe for Children: No need to fire an alcohol lamp, safer for children. Fully assembled, no need to install it yourself.
Great Educational Toy: classroom or laboratory experimental teaching aids, the best choice gift for students, teachers, children, friends and colleagues.

Specification:
Model: D2
Material: Metal,PC
Size: 9.9 x 10.7cm(DxH)
Weight: 193g/6.8oz
Package Size: 19 x 10.8 x 13/7.5 x 4.2 x 5.1in
Package Weight: 307g/10.8oz

Specification:
1 x Stirling Engine Model