Collection: 200-500 usd

SKYMECH 1/3 Turbojet Engine Model Kit - Build Your Own Turbojet Engine that Works - WP-85 Turbojet DIY Aircraft Engine Model 100Pcs

M90 Upgrade Hit & Miss Gas Engine Full Metal IC Engine With Base Collection Gift

TECHING L4 Engine Model Kit that Works - Build Your Own Engine - Full Metal 4 Cylinder Car Engine Kit Car Engine Model Upgraded Version

ENJOMOR 16 Cylinder Swash Plate Stirling Engine Generator Model with LED and Voltage Digital Display Meter - STEM Toy

Metal Solid Wood 3D Dynamic Mechanical Crafts Mystery Aircraft DIY Assembly Model Kit for Kids, Teens and Adults

TECHING Steam Locomotive Train Assembly Engine Full Metal Hardest Build Kit with Track Gift Collection - 387Pcs

Stirling Engine Kit V4 4 Cylinder Stirling Engine External Combustion Engine Model - Enginediy