Activity & Learning Toys

Funwetrike Stirling Engine Model Kit, Double-cylinder Micro DIY Stirling Engine External Combustion Engine, Fun Educational Science Experiment Kit Novel Design: The design of this Stirling engine model is novel and unique, with a simple and exquisite shape, and a sophisticated wooden base, which shows more high-end taste. The top knob can adjust the amount of air conduction to control the... Funwetrike Stirling Engine Model Kit, Double-cylinder Micro DIY Stirling Engine External Combustion Engine, Fun Educational Science Experiment Kit