GIFTS FOR HIM Mechanical engineer or inventor

Turbofan Engine Model Kit that Works - Build Your Own Turbofan Engine - TECHING 1/12 Full Metal Dual-Spool Turbofan Engine Model Kit 300+PC...

SKYMECHMAN 1/24 Scale A38X Turbofan Engine Model Kit Features: Authentic TR900 Engine Design:  Based on official A38X engine blueprints, this mo...

Miniature Turbofan Engine Model Precision-Crafted Removable and Maintainable Jet Engine with Liquid Gas Combustion - Collectible Display for Aviati...

1/3 Scale DIY Horizontal Opposed 6-Cylinder Engine Kit with Operational Turbocharger - Electric Motorized STEM Educational Display Model Product In...

TECHING Mini Turbofan Engine Kit that Works - DIY Metal Electric Jet Engine with Visible Mechanics for STEM Education (170PCS+) Product Information...

TECHING Metal Steam Train Model that Works-Vehicle Toys Gift Collection - Used(Assembled Version) - Like New Why offer this used engine? 50 units i...

1/6 Scale C130 FMD 3D-Printed Variable-Pitch Turboprop Engine Model, STEM Educational Tool Product Information: The 1:6 C-130 FMD 3D-Printed Variab...

V12 Engine Model Kit that Works - Build Your Own V12 Engine - TECHING 1/4 Supercar V12 Engine Model Kit with Synchronized Throttle Sound Effec...