Activity & Learning Toys

Joytopiaminds Stirling Engine Model Kits, Hot Water Powered All-Metal Low Temperature Stirling Engine with Double Flywheel for Physical Science Experiment Display 【Heavy-Duty Metal Construction】Weighing 530g (2-3x heavier than standard models). Features stainless steel cylinder/piston and 10mm-thick D16-C aluminum alloy base with anodized finish for corrosion resistance and extended durability 【Precision... Joytopiaminds Stirling Engine Model Kits, Hot Water Powered All-Metal Low Temperature Stirling Engine with Double Flywheel for Physical Science Experiment Display