Saw this? There's rainbow inside the bottle!! Hahaha. Did this during tuition class, There are many different layers due to every layer has a different density. Just add sugar or salt into water then stir it. Add some colour pigment after that. Do reduce the amount of sugar or salt layer by layer since we wanna make them have different densities.
看见了吗？瓶子里有彩虹！！哈哈哈。在补习课时做的。有很多层因为每一层有不同的密度。之需把糖或盐加进水里然后搅拌。之后再加一些颜色素。记得在每一层减少糖或盐的分量，因为我们要它们有不一样的密度。
A Youtube video is so much better than my explanation. Hehe.
一部Youtube的影片比我的解释好多了。嘻嘻。
It's just that kind of easy. Have a try? 很容易吧！要不要试一试？
♥Yee Mun
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