For science, we should not only study it from textbook, but also experience it in our lives. That’s why we had science week. In this week, our higher-grade students led lower-grade students to do a lot of fascinating and interesting experiments and learn something from them. On the first day of science week, we did the experiment of mixing corn starch and water. Higher-grade students helped teachers finish the site layout such as covering the ground with huge plastic bags to keep the ground clean. Then we helped kids to put on their aprons so that they would not stain their clothes. After all the preparations, we started out experiments. The mixture of corn starch and water was an amazing substance. When we let it still, it was liquid; but when we pressed it really hard, it would become solid. I guessed it was somehow related to attraction force, repulsion force, and the distance between molecules. Looking at those kids playing extremely happily, we did not care if our clothes would be dirty or not anymore and joined them to play together.
On the second day, we did the experiment of magic milk. When we put milk and food color together then put cleanser, the food color would spread and diffuse. I did some research for this experiment. It may be because the density of food color is lower than that of milk; that’s why the food color floated on the milk and stayed still. When we added cleanser, the cleanser would destroy some interior structures in the milk and lessen the surface tension of it so that the food color would move. We were so happy while looking at the expressions of happiness and wonder on those kids’ faces.
On the third day of the science week, we made a beautiful decoration with oil and water. First, we added a small amount of water with a depth of 2 centimeters in a plastic bottle. Then we added plenty of oil but without filling the bottle. The water and oil did not mix with each other because they had different densities. After these steps, we added a few drops of food color. It passed through the oil and mixed with the water at the bottom of bottle. Then we put a piece of Alka-celcer tablets in the bottle; it would sink and react with water to produce a lot of bubbles. If we used flash light to irradiate the bottle from the bottom, the light would go through the mixture of food color and water, then lighted up the oil and bubbles. It looked so beautiful. Kids were really happy because they could keep those bottles as presents.
On the last day of the exciting science week, we did the coolest experiment—Alka-celcer tablets rockets. We put a piece of Alka-celcer tablets in a tiny plastic bottle with water then it would explode. It was because when the tablets reacted with water, they would release a lot of gas; and the lids of the bottles were not able to stop the increasing amount of gas so that they explode. Kids had a lot of fun in wonder but a bit fear too.
For me, the science week was funny and pleasuring. Besides, I was able to learn some scientific knowledge and strengthen the ability of communicating with other people. Most importantly, I noticed the ideas of teaching in Leman. For those little kids, we should always let them do what they could do by themselves and only help them when it is necessary. It is good to build the ability of being independent, Meanwhile, after the experiments, the teachers would always ask the kids why do you think it is like that, certainly, 99% of them could not get the right answers; but it cultivated imagination, the abilities of seeking knowledge, asking why, and thinking. Plus, little kids would say thank you to us after every experiments. They learned to be polite. Science week was pleasuring as well as educational.
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