50-100 usd

Multifunctional LCD Tachometer for CISON Engine Model Features: This tachometer is an instrument specially used for real-time monitoring of rotatio...

Flying Butterfly Model Kit 3D Dynamic Mechanical Crafts Kinetic Butterfly Model Kit for Kids, Teens, and Adults Features: .The box features a buil...

Mechanical Flapping Wings Dynamic 3D DIY Mechanical Metal Ornithopter Model Kit Features: .Equipped with a Type-C interface, this model eliminates...

Mechanical Butterfly Dynamic 3D DIY Mechanical Metal Butterfly Model Kit for Kids, Teens, and Adults Features: .Experience freedom from power cons...

Mechanical Phoenix DIY Metal Assembly 3D Puzzle Model Kit Features: 1. Dynamic Mechanical Phoenix Design: Crafted from durable stainless steel, th...

Mini Desktop Variable Speed Drill Press Precision Drilling Machine (B10 Chuck Standard Version)Features:.Compact and Easy to Operate: This mini dri...

SKYMECHMAN TR900 DIY Functional Turbofan Aero Aircraft Engine 3D Printed Assembly Model (Dynamic KIT Version/50PCS+)Features:.Original Design: This...

RETROL Full Metal Beam Steam Engine Model and Horizontal Boiler with Centrifugal Regulator DIY Assembly Kit (84PCS)Features:.Wonders of Steam Pow...

DIY Mechanical Scorpion Metal Assembly Toy Creative Ornament (Kit Version/430PCS/Purple) Features: Creative Design: Inspired by the natural form of...

V8 Engine Model Kit that Works - Build Your Own V8 Engine - V8 Engine for Capra VS4-10 RC Full Simulation Engine: V8 internal combustion engine s...

Mystery Box-Build Your Own Turbofan Engine  Buy TECHING Turbofan Engine, Get Mystery Turbofan Engine Building Block Do you like to be surprised? Do...

3D DIY Mechanical Dynamic Butterfly Metal Assembly Model with Music Box  (Kit Version/300+PCS/Grey/Blue/Red)Features:Portable Power:  No need to st...

3D Mechanical Bionic Beetle Assembly Model Kit with LED Lighting Eight-Cylinder Engine Note:  On pre-sale, shipping in mid-September The Iron Flyi...

RC ERA C138 1/33 Scale 206 Helicopter 2.4G 6CH No Aileron Helicopter with Altitude Hold (RTF Version/Red & Black & White/Blue& White)Fe...

Mechanical Angelfish 3D DIY Steampunk Animal Model Vibrant Metal Assembly with Creative Mechanical Fins (Kit Version/529PCS/Blue/Red) Looking to ad...

Mechanical Devilray 3D Steampunk Metal DIY Assembly Kit with Bright Eyes and Translucent Wings (422PCS) Explore the Mechanical 3D Steampunk Metal M...

Mini Bluetooth Music Tesla Coil Plasma Loudspeaker Whether you're a science enthusiast, a student looking for a cool experiment, or simply someone ...

Handheld Tesla Coil with 10cm Long Arc Artificial Lightning Generator Educational Science Experiment  Excellent Design: This product features a new...

3D Metal Mechanical Butterfly Assembly Model Kit with Mechanical Transmission Ever wanted to combine the beauty of a Butterfly with the precision o...

3D Metal Steampunk Mecha Assembly Model Kit Christmas Blind Box (500+PCS/Set of 7) Ready to build your very own steampunk mecha army this Christma...

Starter Kit for ENJOMOR GS-L4 36cc DOHC L4 Engine Inline 4 Cylinder 4 Stroke Water-Cooled L4 RC Gasoline Engine Model  Specifications: 75ML Miniatu...

Mini Swing Type Steam Engine Generator Steam Power Machine Educational and Hobby Gift More Details: Have you ever wondered how steam engines work? ...

Bluetooth Music Tesla Coil with 10CM Arc Length (US-Plug) Product Information: Explore the magic of science with our Bluetooth-enabled Tesla coil....

Hero's Engine Steam Ball Model Kit (Silver/Black） Product Information: Embrace the power of steam and explore ancient engineering like never before...