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September 2025

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2025年9月11日 / Last updated : 2025年9月11日 桑子 研 Science

Blast Off! An Easy DIY Science Experiment for Kids: The Paper Cup Rocket

I’m Ken Kuwako, a science trainer. Every day is an experiment. Do you know about a special ‘flying experiment’ that the whole family can enjoy? All you need are cardboard and paper cups that you have at home. No special tools are required. You might be surprised and think, “Huh? Can it really fly?”, but […]

2025年9月11日 / Last updated : 2025年9月11日 桑子 研 Science

Hold Science in Your Hand! Unlocking the Secret of the Vein’s One-Way Valve

Hi, I’m Ken Kuwako, a science trainer. Every day is an experiment. Have you ever thought about how blood flows through your body? With every beat of your heart, blood circulates throughout your entire body, delivering energy and oxygen. Imagine this: the blood pumped by your heart travels all the way to the tips of […]

2025年9月10日 / Last updated : 2025年9月10日 桑子 研 Science

The Magic of Mists: A Dazzling Flame Test You Can Do with a Spray Bottle!

I am a science teacher and a professional writer. I will organize the following blog post under the given conditions. #Constraints: The target audience is the general public and junior high/high school students. Image insertion, videos, links, and other code should remain in their original locations. Develop the article into an interesting, educational piece with […]

2025年9月10日 / Last updated : 2025年9月10日 桑子 研 Science

From “EEK!” to “THANK YOU!”: The Surprising Truth About Japan’s Largest Huntsman Spider

I’m Ken Kuwako, your science trainer. Every day is an experiment. Have you ever shrieked, “A spider!” and jumped in surprise? When I found a huntsman spider at school, I got that same jolt. The one I saw before was so big and imposing that it made me shriek, “Yikes!” But the one I found […]

2025年9月10日 / Last updated : 2025年9月10日 桑子 研 Science

Uncovering the Physics of Mermaid Lagoon: A DisneySea Adventure

I’m Ken Kuwako, your Science Trainer. Every day is an experiment. Have you ever been to an amusement park and noticed the scientific secrets hidden in plain sight? The acceleration of a roller coaster, the graceful arc of a fountain’s water, the countless magical illusions—all of them are precisely crafted using the laws of physics. […]

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著者:桑子研(くわこ けん)
 科学の楽しさや不思議、感動を多くの人に届けていきたい。理科教師として勤務する傍ら、サイエンストレーナーとしてテレビ番組の科学監修・出演、実験教室、科学本執筆なども行っています。

Author: Ken Kuwako
I want to share the fun, wonder, and excitement of science with as many people as possible. In addition to my work as a science teacher, I also work as a "Science Trainer," providing scientific supervision for and appearing on TV programs, holding hands-on science workshops, and writing science books.

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Recent posts

Why Does a Motor Keep Spinning? Unraveling Fleming’s Law and the Secret of the Commutator with Digital 3D and Papercraft!

2025年10月19日

The $20 Science Breakthrough: Prove Light is a Wave with a Paper Cup!

2025年10月19日

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The Earthquake Experiment: Watch Your Desk Turn to Quicksand!

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It’s Not Magic! The Science Behind the Balloon That Bends Water (Static Electricity Experiment)

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2025年10月17日

One Safety Pin to Stop Static!? The Shocking Life Hack That Ends the Zap!

2025年10月17日

Why Is the Blue Flame the Strongest? Understand Gas Burners Perfectly by Thinking Like Gas Itself!

2025年10月17日

The Slinky Secret: Visualize Sound and Earthquakes with a Toy Spring

2025年10月16日

Why Does Salt Water Conduct Electricity but Sugar Water Doesn’t? The Shocking Secret of Kitchen Chemistry!

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