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2025年9月17日 / Last updated : 2025年10月13日 桑子 研 Science

We Built a Volcano—and It Was Explosively Fun! The Ultimate Experiment Recipe Using Plaster and Baking Soda!

I’m Ken Kuwako, a science trainer. Every day is an experiment. In a science class, the most fun part is always getting your hands dirty and “giving it a try.” There’s nothing more rewarding for us teachers than seeing the bright, sparkling eyes of our students and hearing them shout, “I get it!” Recently, I […]

2025年9月17日 / Last updated : 2025年9月16日 桑子 研 Science

A Box Inside a Box! Create the Magical CMY Water Cube of Light! (Refraction & Primary Colors of Light)

Ken Kuwako, the Science Trainer. Every day is an experiment. 【Listen to the podcast about this article!】 Experience the “Magic of Color” with a Handmade CMY Water Cube! Have you ever struggled to find an interesting way to teach about light and color? Today, I’d like to introduce a project I made myself: the “CMY […]

2025年9月16日 / Last updated : 2025年10月26日 桑子 研 Science

Truly Terrifying Once You Know: Hair Standing on End—A Lightning Warning? Deadly Signs Before a Strike (Static Electricity)

Ken Kuwako, your science trainer. Every day is an experiment. Your Hair Standing on End? It’s No Laughing Matter! It Might Be a Final Warning From the Sky… What if you’re outdoors and your hair, or your friend’s hair, suddenly starts to stand on end for no reason? This might not be a situation where […]

2025年9月15日 / Last updated : 2025年9月16日 桑子 研 Science

Turn Your Bathtub into a Science Lab! Feel the Power of Water Pressure with Rubber Gloves

I’m Ken Kuwako, a science trainer. Every day is an experiment. Feel the “Invisible Force”! A Fun Experiment on Water Pressure You Can Do in the Bath Have you ever felt a strange, tight-squeezing sensation when you dive deep into a pool or bathtub? That’s actually the work of water’s “invisible force,” or water pressure. […]

2025年9月15日 / Last updated : 2025年9月15日 桑子 研 Science

Beyond Pikachu’s Shock! Experience 150,000 Volts of Static Electricity with a Van de Graaff

I’m Ken Kuwako, the Science Trainer! Let’s have fun with science together on this site. Have you ever touched a doorknob on a dry winter day and had a “ZAP!” with a spark flying, making you involuntarily yelp? That small, but definitely painful, “static electricity.” Did you know that this phenomenon has a surprising connection […]

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運営者: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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2025年12月27日

Visualizing Physics with a Flying Hammer! Revealing the Beautiful Path of the Center of Mass Using a Smartphone App

2025年12月26日

When Your Fridge Becomes a Lab: The Fascinating World of Standing Waves Drawn with Springs and Magnets

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Just Stack It and Electricity Flows! The Burger-Style Voltaic Battery and the Drama of Redox Reactions

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