Product Name: KX2131 - The Shark That Disappears and Reappears
Product code: KX2131 - The Shark That Appears and Disappears
Size: Approx. 100mm * 100mm * 60mm
Weight: About 8g
Material: Plastic
Color: Mixed
Battery: No
Packing: 500 pcs
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 in the field of education, which is pursued and explored. More and more teachers and parents are beginning to pay attention to cultivating children's scientific literacy from an early age, so that children can develop good personalities and behavioral habits from the beginning. Parent-child interactive crafts can improve the quality of parent-child companionship, improve the relationship between parents and children, and we spend time with our children, without mobile phones, iPads, or televisions, only joy, interaction, and communication. It can cultivate the ability of children to solve problems by themselves. When children encounter problems, they should first see and experience the solution themselves, because parents and teachers solve problems in the process of doing crafts. It can develop children's imagination. In children's world, cars can fly in the sky, and the sun can be green. Playing with DIY crafts can cultivate children's practical ability by using different tools, which fully exercises children's little hands. Brushes, paints, scissors, hot-melt guns, glue"Children are brave to try any tools and to some extent, they are developing different skills. Improving children's self-confidence in the process of handcrafts, we try everything possible together, experience many failures, but we always succeed, which to some extent enhances their self-confidence. Cultivating children's concentration when children explore various tools and handcrafts, they are very focused, and if there is no external disturbance, they can continue to explore.

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 Application: Thermo-sensitive color-changing stickers are made from a material called thermo-sensitive pigment. Their color can change with temperature changes. When the temperature rises, the black thermo-sensitive pigment disappears, and the shark that was hidden in the pigment appears. As the temperature drops, the black thermo-sensitive pigment reappears, covering the original image, making the shark disappear. This makes it look like the shark on the sticker appears and disappears for a while.

Experimental Cognition: A temperature-sensitive color-changing sticker can change color at a specific temperature. This sticker is made by using the principle of temperature-sensitive color-changing pigments.

Knowledge Expansion: Physiologists have studied and concluded that an environment around 30°C is the optimal temperature for human sensation, which is also very close to the temperature of the skin. When working under high temperatures of 33°C for 2 to 3 hours, the human "air conditioning" sweat glands begin to activate, allowing the body to dissipate accumulated body heat through slight perspiration.

Knowledge Extension: The color-changing principle of the temperature-sensitive color-changing pigment series uses the difference in temperature to control the change in color. The color-changing form of temperature-sensitive color-changing pigments is low-temperature colored and high-temperature colorless, which can be repeatedly changed. The colors can be mixed with each other, and other dyes can also be added to tune the color. The temperature selection is -15℃ to 70℃.

Safety Warning:

All the accessories in this product are specially designed for student experiments. Please use them under the supervision of teachers and parents to ensure safety! Do not consume any of the products! They are not suitable for children under three years of age. Do not approach fire sources. Before assembling any batteries, please check if the circuit is clear, all parts of the circuit are complete, and all contacts are good. The + on the battery is the positive pole, and - is the negative pole. Be careful during the assembly process, and if glue is used, do not get it in your eyes or on your skin.