Under $399 USD

1/10 Scale 2.4G 4WD RC Off-Road Car RTR Version Features: Realistic Driving Experience:  Enjoy forward, backward, left, right, braking, and remote-...

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

3D Metal Mechanical Hummingbird Model KitNote: This is a semi-finished product (only the wings need to be assembled) Features: Lifelike Bionic Moti...

RETROL GF-01 Functional Mechanical Transmission Kit - Bring Your SE Series Steam Engine to Life !  Model for Enthusiasts and Vintage Steampunk Work...

RETROL SE-03 Stationary Mill Steam Engine: Power On with Boiler, Generator & Lamp. A Functional Miniature Model for Adults & Collectors, Vi...

3D Metal Mechanical Flying Fish Dynamic Bionic Model Features: Bionic Flying Fish Design:  Inspired by the real flying fish, this mechanical model ...

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...