Experimental supplies: transparent cups, salt, water, boiled eggs.

Experimental steps:

Prepare two cups of water, put the eggs in two cups respectively, and observe the state of the two eggs. Add salt to a cup and observe the state of the eggs.

Experimental results: the first observation of the state of two eggs is that all the eggs have sunk; The second observation of the state of eggs showed that the eggs in the salty cup gradually floated up with the increase of salt content.

Experimental purpose: Through experiments, let children understand that different liquid densities have different buoyancy.

Experimental experience: The first step for preschool children to enter science is curiosity. The core of enlightenment is not to let children remember those abstruse noun concepts, but to make children interested in things they don't understand and think seriously, so as to tap their creativity and cultivate their divergent thinking.

Physicists say in published papers that simple objects can make convincing experiments.

Second, the resurrected "stick figure"

Experimental supplies: whiteboard pen, tap water, white porcelain board.

Experimental steps:

Print the stick figure on a white porcelain plate with a whiteboard, slowly pour tap water into the porcelain plate, and observe the state of the stick figure.

Experimental results: the stick figure will float, just like being resurrected.

Experimental purpose: To understand that the whiteboard pen actually contains stripping agent, which can prevent the notes from being closely combined with the writing surface, so the whiteboard pen is easy to erase when writing on the whiteboard.

Experimental experience: Explore the difference between whiteboard pen and other pens. This feature can be used to do many more interesting things. For example, if you draw a flying saucer in a porcelain dish with a marker and an alien on a whiteboard, you can use the direction of water to interpret the story of an alien landing or ascending to heaven.

China Institute of Parenting Science pointed out in its speech that children's creativity often comes from curiosity and endless play.

Third, the story of cups and pieces of paper.

Experimental supplies: flat cup, A4 paper, tap water.

Experimental steps:

Fill the cup with water, put A4 paper flat on the mouth of the cup without any gap, turn the cup over quickly and observe the state of A4 paper.

Experimental results: A4 paper will not fall off the water cup.

Experimental purpose: Let children feel the existence of atmospheric pressure.

Experimental experience: Help children know more about what kind of environment they live in. Know the existence of atmospheric pressure and find more experiments to prove the existence of atmospheric pressure. Enhance children's creativity and observation. And study the unknown spirit.

Mr. Ye Shengtao once pointed out that the knowledge in books is not the basis of our study, and the purpose of learning knowledge is to be able to use books to draw inferences and gain more abilities.

Fourth, dancing rice

Experimental supplies: baking soda, pigment, white vinegar, rice grains, tap water and transparent cups.

Experimental steps:

Pour tap water into a cup, add pigment and baking soda to half a cup, and stir well. Put a small amount of rice grains into a cup to observe the state of rice, and add white vinegar to observe the state of rice.

Experimental results: The state of rice was observed for the first time, and it was precipitated. After adding white vinegar, in addition to many bubbles in the cup, the rice grains are also fluctuating, just like dancing happily.

Experimental purpose: To understand the formation of carbon dioxide bubbles, which belongs to chemical reaction. The same applies to carbonated drinks such as cola and sprite that we drink.

Experimental experience: We can experience the scientific experiments of things around us. It turns out that what we drink and eat every day comes in this way, which stimulates children's interest in exploring nature. Enhance children's creativity. Children can also use other raw materials instead of rice grains, such as raisins, which can be submerged in water. Thereby distracting the child's thinking.

Darwin once said that the so-called science is the endless exploration of nature. Only with the spirit of understanding everything can we find more meaning in life.

5. Small pieces of paper that have been sucked.

Experimental supplies: paper, plastic ruler.

Experimental steps:

First, tear the paper into pieces and grind it as finely as possible on clothes or hair with a ruler. Quickly put the ruler on the small piece of paper 1 cm and observe the state of the paper.

Experimental results: Small pieces of paper were adsorbed on the ruler.

Objective: To understand the electrostatic reaction and observe what other electrostatic reactions exist in our life. How to avoid electrostatic reaction?

Experimental experience: From the small experiment with life, when the climate is dry, you will see a small electric light when you take off your clothes, and you will be shocked when you open the door. Two people will suddenly be shocked by each other. These are all due to static electricity. Let children extend from an experiment to life and apply what they have learned. Cultivate children's observation ability and hands-on ability.