Product Name: KX2099 Howitzer
Product code: KX2099 Cannon
Dimensions: Approx. Length 150mm * Width 110mm * Height 60mm
Weight: About 108g
Material: Wooden
Color: Mixed
Is the device powered by batteries: Yes
Packing: 200pcs
Box Specification: 600*450*550mm

Preface:

In today's society, where children's education is increasingly valued, scientific enlightenment education has gradually become an important topic of exploration in the field of education. More and more teachers and parents are beginning to
Emphasizing the cultivation of scientific literacy in children from an early age, so that children develop good personalities and behavioral habits from the very beginning. Parent-child interactive crafts can improve the quality of parent-child companionship, and change
Good parent-child relationships, the time we spend with our children without smartphones, iPads, or television is filled with joy, interaction, and communication. It can help cultivate the ability to solve problems on their own.
Decision-making skills are important for children to learn. They should first see and experience the problem themselves to solve it, because this is how parents, teachers, and others solve problems in the process of doing crafts. This can help develop children's problem-solving skills.
The imagination of children, in their world, cars can fly in the sky and the sun can be green... Playing with DIY crafts can cultivate children's ability to practice by using "
Different tools were used, allowing the child's small hands to fully engage in activities. Brushes, paints, scissors, hot glue guns, glue....., they were all willing to try out, and to a certain extent, they were also able to master them.
Degree of development of different skills. Improving children's self-confidence in the process of handcraft, we try all possibilities together, experience many failures, but always succeed, in a
To a certain extent, it has enhanced his self-confidence. When a child is exploring various tools and crafts, he is very focused, and if there is no external interference, he will continue to be so.
Excuse me, he can keep exploring.

The purpose of the experiment: To enable children to learn more about scientific knowledge and their own ability to practice by means of game entertainment.

Principle of Application: Four AA batteries in series output 6V to drive the pump, making it work and blowing air into the launch tube. Due to the foam ball blocking the front of the launch tube, the air continues to
In compression, when the pressure reaches a certain level, the foam ball cannot resist the internal pressure of the tube, causing the compressed air in the tube to explode, sending the foam ball out.

Experimental Cognition: The cannon has a relatively large barrel length to caliber ratio and a smaller number of charges, making it suitable for low-trajectory shooting. It is mainly used for shooting vertical targets, armored targets, and long-distance targets.
Away from the target.

Knowledge Expansion: A cannon is a field gun with a long barrel and a straight, low-flying trajectory. It first appeared in the 14th century and was applied to warfare. In the 16th century, people began to refer to this type of weapon as a "cannon.
A cannon with a longer barrel is called a howitzer. In the 18th century, European howitzers had a barrel length of approximately 22 to 26 times the caliber. In the 1920s, howitzers with a specific trajectory for cannonballs appeared.
Specialized artillery for warfare. During the period before and after World War II, howitzers with calibers ranging from 105 to 180 mm experienced rapid development. The muzzle velocity reached 880 meters per second, and the maximum range reached 30 thousand meters.
Rice.

Knowledge Extension: During World War I, due to the development of trench warfare with fortified positions, the belligerent nations needed to increase their use of direct-fire and indirect-fire artillery.
To meet this special requirement, some countries began to research and manufacture howitzers that combine the features of anti-tank guns and howitzers. The first howitzer to combine these features was developed in Germany in 1915.
Experiment, which appeared in the armies of other countries after the First World War.

Safety Warning:

All the accessories in this product are specially designed for student experiments. Please use them under the supervision and guidance of your teacher and parents to ensure safety! All products are prohibited from consumption! They are not suitable for children under the age of three.
The following children use, please do not press near the fire source. If used to assemble the battery before, please check whether the circuit is unimpeded, whether the circuit accessories are complete, and whether each contact is in contact.
Good, the + on the battery is the positive terminal and the - is the negative terminal. Be careful during the assembly process, and if glue is used, do not get it in your eyes or on your skin.