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Self-study that teachers will praise! Recommended independent science study ideas for 4th graders

10 years as a kindergarten teacher / elementary school teacher / junior and senior high school teacher / childminderkepiko
Graduated from Kunitachi College of Music, Faculty of Music (now: Department of Music Culture and Education, Early Childhood Music Education major). In elementary school, my homeroom teacher was Jun Kusaba, a game researcher. After graduating from university, I worked as a kindergarten teacher for 10 years and as an after-school childcare instructor for 7 years, then took a position as a music teacher at an international school in Singapore. In addition to music education, I engaged in activities that introduced Japanese culture, traditional games, and recreational activities, working with many children. Later, through freelance writing, planning, and editing at Shogakukan, I met many delightful adults and experienced the joy of communicating and sharing. Drawing on the perspective cultivated in the field of education and my experience as an editor, I provide practical information with an emphasis on both input and output, mainly in areas related to music and children. My hobbies include instruments, singing, handicrafts, toys, drawing, traditional games, the outdoors, and books. My special skill is spinning-top tricks.

Independent study in science can be a fun adventure for kids!

Here, we introduce self-directed science topics recommended for fourth graders that are sure to impress their teacher.

When you explore freely, learning becomes even more enjoyable.

Observe the nature around you, try simple experiments, and enjoy the thrill of discovering new things.

As your interest in nature and science grows, it’s also fun to share what you’ve learned with friends and family.

Please use this as a guide and let’s jump together into the exciting world of science!

Self-Study That Earns Your Teacher’s Praise! Recommended Science Self-Study Ideas for 4th Graders (11–20)

Tofu making

[Easy] Homemade Tofu Making: Explaining How Tofu Sets (Coagulates)

Tofu making

Here’s how to make tofu, a beloved Japanese food that’s delicious both on its own and cooked.

Like a science experiment, you’ll learn why tofu solidifies while also enjoying the finished homemade tofu.

Heat soy milk in a pot to 75°C (167°F), then add nigari (magnesium chloride) and stir.

Cover and let it sit to steam for about 10 minutes, then transfer the solids into a mold lined with cloth.

Place a weight on top to remove excess moisture, then soak the block in water set in a bowl for about 20 minutes.

Your tofu is ready.

It’s also fun to make while learning that the liquid solidifies because the magnesium in the nigari binds with the proteins.

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Fizzy Ramune Experiment

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Why not try making fizzy ramune tablets for your summer break science project and enjoy their colors and sounds when dropped into water? After thoroughly mixing ingredients like powdered sugar, cornstarch, and food-grade citric acid, add food coloring to make them visually fun.

Press the mixed dough with two spoons to shape it just right.

Let them dry for about half a day to finish the ramune.

When eaten, they fizz in your mouth, letting you experience the curious chemical reaction of carbonation.

It’s a safe project even for children, using the carbon dioxide produced by the reaction between lemon juice’s acid and baking soda.

You can boost originality by changing the colors and flavors.

It’s a great idea for learning chemistry with familiar materials.

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Let’s learn about sugar crystallization while making canelés.

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Let’s make an experimental piece using a canelé mold for sweets.

Put powdered gelatin into a container filled with water and heat it in the microwave.

After heating, add sugar, color it with edible food coloring, and heat it in the microwave again.

Pour it into the canelé mold, and once it sets, remove it from the mold.

Your beautiful, colorful sugar canelés are ready.

At first, they look jiggly, but after a week, the sugar crystallizes and they turn into sparkly, crystal-like pieces.

You can enjoy watching the sugar change over time.

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Experiment where ham melts with kiwi

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Here’s a curious and fun science project using kiwifruit and ham.

Get your materials ready: kiwifruit, ham, paper, and felt-tip pens.

Place a sliced kiwifruit on top of a halved piece of ham.

By timing this setup, you can find out how many minutes it takes for the ham to start breaking down.

If you photograph the changes over time, your project will gain more depth.

You might discover something new by comparing heated kiwifruit with unheated kiwifruit.

Write down the purpose of the experiment and your results to complete your summer science project.

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Making Konpeito (traditional Japanese sugar candy)

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Let’s try making handmade konpeitō—colorful, cute sugar candies—for a summer vacation science project.

Boil sugar and water to make syrup, then gradually add small amounts of konpeitō cores; as you do, little spikes will slowly form on the surface.

By adding food coloring or flavorings during the process, you can customize the taste and color to your liking.

Even without special equipment, you can keep stirring and improvising with a frying pan or a bowl; it takes time, but the candies will gradually take on the characteristic konpeitō shape.

Because the results change depending on the temperature and timing of sugar crystallization and how you stir, it’s also enjoyable as a science experiment.

It’s a rewarding idea that nurtures both confectionery skills and observation.

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Ice that freezes in 3 minutes

[Independent Research] “Ice Cream That Freezes in 3 Minutes!?” Science Experiment: How to Make Science Sweets

Ice that freezes in 3 minutes

This is a science project where you make cool, tasty ice cream in a short time.

Put heavy cream, chocolate sauce, and chocolate chips in a zip-top bag and seal it tightly, then place it inside another larger bag filled with ice and salt.

Adding salt lowers the temperature of the ice, quickly freezing the cream inside the bag.

Wrap it in a towel and shake well, and in about three minutes the ice cream is ready.

The crunchy chocolate bits are fun, and the flavor is very satisfying.

Scientifically, the key is that salt lowers the melting point of ice, causing an endothermic process that absorbs energy and freezes the contents.

It’s an idea packed with both deliciousness and learning, letting you experience the relationship between cold and chemistry.

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Self-study that impresses your teacher! Recommended independent science study ideas for 4th graders (21–30)

How to make rainbow punch

[Independent Research] How to Make “Rainbow Punch” – Science Experiment: Science Sweets

How to make rainbow punch

Rainbow punch is perfect for a science project where you can learn about color and state changes.

Divide shaved ice syrup into several cups and mix in your favorite colors.

Dissolve gelatin in hot water and combine it with each colored syrup, then chill in the refrigerator to set into jelly.

Place the colorful jellies in a glass, and finally pour in soda water—your rainbow drink will sparkle with fizzy bubbles.

By observing the transformation of gelatin from liquid to solid and how it interacts with carbonated water, you can deepen your understanding of color and temperature-related state changes.

It’s an idea that’s visually fun and scientifically rich, letting you enjoy both observation and experimentation.

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