Under $100

Manson Hot Air Stirling Engine External Combustion Engine Model STEM Science & Education Toy Gifts for Technology Enthusiasts   Fe...

Handheld Mini Metal Electric Grinder Drill Accessories DIY Tools Set Description: 1. Multifunctional electric grinder: mini multifunctional electri...

Semi-automatic Hand Twist Drill Hole Punch Accessories DIY Tools Set (Blue) Description: 1. Hand twist drill tool: This model is a blue reinforced ...

Six-claw Welding Platform Bracket with Magnifier & Flashlight Professional DIY Repair & Disassembly Tools Features: 1. Six claws multi-func...

V8 32 Air Valve 8-Cylinder 4-Stroke Engine Model Building Blocks Set MOC-5880--871PCS Features: 1. Static model to demonstrate the charm of mechani...

63 Speed Gear Box (Include Reverse) Model Building Blocks Set MOC-40533--415PCS Designed by TechnicBrickPower: This interesting design implements a...

All-metal Horizontal Single Cylinder DIY Steam Engine Stem Model Set A steam engine is a heat engine that performs mechanical work using steam as i...

Car Engine Maintenance Flip Stand Metal Engine Rotating Platform for 1/10 1/8 Models (KIT Version/Black&Red)Features:.High-quality Materials: M...

Semi-automatic Hand Twist Drill Hole Punch Accessories DIY Tools Set (Blue) Description: 1. Hand twist drill tool: This model is a blue reinforced ...

ENJOMOR γ-Type Stirling Engine Generator Model Science Experiment Educational Toy with LED Light Bar and Fan Features: (Exclusive custom) γ Stirli...

ENJOMOR Metal Balance Hot Air Stirling Engine Model Educational Toys & Gifts Features: 1. Metal precision model: This balance Stirling engine i...

ENJOMOR Metal Balance Hot-air Stirling Engine Model with LED Lighting Set Educational Toys Gifts Features: 1. Creative design: the use of Stirling ...

ENJOMOR Mini Vertical Flywheel Stirling Engine Model with Adjustable Speed Educational Toys&GiftsFeatures:.The Stirling engine, a simple but el...

Steam Engine Model Kit Full Metal Steam Generator Heating Boiler Engine with 4 Alcohol Lamps Steam engine kit full metal steam generator heating bo...

A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by stea...

Microcosm P66 Mini Steam Engine Handle WheelMini Steam Engine Handle Wheel can be used to different mini steam engine, you can control your engine ...

DIY Assembly Steam Engine Kit Model Science Experiment with Electric GeneratorThe steam engine is more maneuverable and functional, compared with s...

KACIO Mini Live Steam Engine Model Single Cylinder Swing Steam Engine with Boiler A steam engine is a heat engine that performs mechanical work usi...

ENJOMOR Two-cylinder Stirling Engine Model Engine Teaching Show Model Science Educational Toys - Golden Features:Exquisite Decoration Model: The ov...

L-Shaped Stirling Engine Model with Voltage Digital Display Meter Gyroscopes and Bulb- Enginediy Customized L-shaped Stirling Engine: The engine is...

Dragon-shape Balance Stirling Engine Generator Model Science Experiment Teaching Aids Gift Features: .Novel Shape: This is an exquisite Stirling ...

Metal Steam Boiler for Steam Engine Model Features: .The boiler needs to be used in conjunction with the steam engine model. .The steam boiler is...

ENJOMOR γ-Type Hot-air Stirling Engine External Combustion Model LED Lights Voltage Digital Display Meter Generator Model ToyFeatures:Science Educa...

ENJOMOR Golden Gamma Hot Air Stirling Engine External Combustion Engine Model Mini Electric Generator to Light LED Light and BulbFeatures:.The mode...