The airplane is one of the fastest transortation, now we can build a twin-engine taxiing plane by ourselves to understand the structure of the plane, understand which parts the plane is mainly composed of, understand what the power of the plane is generated from and understand the simple parallel circuil. Battery required 2 x AA (not included)
Small train:
Train is the most important mechanical transportation tool in human history.
In the early days, it was called steam locomotive or train.
There are independent tracks for driving. According to the load, railway trains can be divided into freight cars and passenger cars; there are also passenger cars with both.
Numerous continuous vehicles generally refer to trains, which are connected trains consisting of traction locomotives and carriages for cargo or passen- gers.
Now we can build a small train by ourselves to understand the structure of the train.
Material package does not contain cans(can not included).
Battery required: 2 x AA (not included)
Shooter:
The shooting device involves many knowledge principles such as lever, inertia, and parabola.
Put the ball in the tossing plate and press the throwing board hard, and the ball will fly along the parabola to the front basket.
Whether a small ball can be shot into the basket depends on how hard you press the throwing board with your hand.
Just like a basketball shooting, you also need to master the strength to get it in.
Earth, Moon and Sun:
The Earth-Moon-Day Movement Demon-stration
Model is a simple three-ball instrument model toy that can vividly depict the relative movement of the earth, the moon, and the day.
The intuitive teaching model.
Children can use their hands to make the earth, moon, and sun in the model operate according to the actual operation rules.
Traffic light:
Traffic lights are traffic lights that direct traffic operations and are generally composed of red, green, and yellow lights.
A red light indicates that traffic is prohibited, a green light indicates that traffic is permitted, and a yellow light indicates a warning
The current traffic lights are all intelligently controlled, which can automatically control the switching time between red and green lights according to the traffic conditions.
Now let's make a simple traffic signal and understand how the circuit of the traffic signal is connected
A small electric fan:
Fan, refers to the hot day with the wind to get cool appliances.
An electric fanis a device that generates airflow by driving it electrically.
The fan in the device is powered on and turns into natural wind to enjoy the cool air.
Now we make our own fan to under- stand the structure and principle of the fan.
We need to use dc micro motor, battery box, switch and other accessories, these accessories are built with series circuit, after the production into a small fan
