Color:

Penguin Clock

Pencil will conduct electricity

Cat and Mouse

High Altitude Bicycle

Bevel-the motion of an object

Flying over Luding Bridge

Hand generator

Hand-cranked generator [upgraded version]]

Hand generator [Deluxe Edition]]

Bevel height adjustment

Bear

Climbing monkey

Steamboat

Lifting platform

Wind Vane

Globe

Sail car

Balance bird

Double track slope

Magnetic car

Submarine

A ball that cannot be blown off

Solar helicopter

Microscope

Tyrannosaurus Rex

Lunar Rover

Artificial Satellite

Genesis of lunar facies

Crab

Magdeburg hemisphere

Lantern

Pole scale

Hook roller

Sundial

Rocket Launcher

Geosynchronous satellite model

Space Laboratory

Zhu Rong

Sweeping robot

Brine power generation fan

Balance

Waterwheel

Loom

Earthquake alarm

Wire maze

Solar double ring

Periscope

Tidal power generation

Wind turbine

Brine generator

Electric Wind boat

Pressure well

Transmitter

Hand painted facial makeup men

Hand painted facial makeup female

Mathematical decomposition ruler addition and subtraction

Yongdong pen

Tension structure

Blowing suspended ball

Wheelbarrow

Rack car

Woodpecker

Rubber band power car

Fire alarm

Sweeper

Suspended train

Homemade Water Dispenser

Cable-stayed bridge

Hand Fan

Colorful small table lamp

Crawler robot.

Solar Car

Eight-legged robot

Space instrument

Horizontal Bar robot.

Hovercraft

Answering Machine

Hand pressure water pump

Electromagnetic Crane

Graffiti robot

Electromagnetic swing

Electric Barrier Gate

Electric roller

Wind power generation

Walking Robot

Steel ball slide

Red flag lifting platform

Day and night alternation

Pinhole imaging

Earth and Moon three-ball instrument

Power generation cabin

Solar cabin.

Tank car

Gravity trolley

Hydraulic lifting platform

Fan

Solar fan

Hydraulic shark

Reel well

Arch Bridge

Sliding machine

Slide projector

Foam cutter

Hydraulic loader

Remote control four-wheel drive

Passenger Train

Hydraulic Excavator

Pull back trolley

Automatic serve machine

Compass

Jeep

Lift Elevator

Safe Box

Wind car

Big Dipper

Solar street lamp

Gear drive

Drying machine

Traffic lights

Shooting Device

Fighter

Fire ladder

M elevator

Voice control car

Electric Wind car

Recoil trolley

Small wind car.

Rubber band pull back car

Colorful optical fiber lamp

Currency detector

Micro wind power generation

Gravitation

Vacuum cleaner

Magic Box

Ming ship

Phonograph

Pencil sharpener

Solar truck

Siege crossbow

Amphibious Ming ship

Newton pendulum

DNA model

Hand Music Box

Spinning Machine

Windmill cabin

Manipulator

Guitar

Rubber band Small Sailboat

Simple electric fan

Static Flying Snow

Radar

Vertical washing machine

Electric rolling shutter door

Grain transporter

Conveyor belt

Ferris wheel

Crossing Fire line

Fire yao

Electromagnetic rotating fan

Electric flying chair

Hand-cranked butterfly

Electric generator

Air-powered car.

Brush car

Double-headed street lamp

Catapult

Twin-engine taxiing aircraft

Balance robot

Beili Bridge

Ball seesaw

Rickshaw

Mechanical Pendulum

Mixer

Mini speedboat

Flute

Hand Crane

Dancing Robot

Saltwater kinetic energy vehicle

Shaking fan

Self-made Roller

Round mid-autumn festival lantern

Remote control racing car

Map of China

Level meter

Telescope

Holographic Projection

Wind turbine (Deluxe Edition)