Author's Note

PART 1: The Science of Everyday Life

001 Why do water droplets form in a cup of cold water?
002 Old books smell like chocolate?
003 Why is there water standing in the toilet bowl?
004 Why do white foams appear in green soap?
005 How do vending machines distinguish coins?
006 How can depression be treated with medication?
007 Why don't people in Antarctica or the North Pole catch colds easily?
008 How do two yolks appear in one egg?
009 Can a chick hatch from an egg I bought?
010 Chocolate keeps you warm?
011 Why doesn't anesthesia hurt?
012 Why does it feel cool when you spray water in the summer?
013 Why don't you get burned in the sauna?
014 Why do white foam form in stews and soups?
015 Why do fruit flies appear a lot when I leave fruit outside?
016 Why is the injection given in the arm?
017 Why does my head hurt when I eat cold food?
018 Why do flies rub their legs?
019 Why are soap bubbles always round?
020 Why doesn't a balloon blown by mouth float?

PART 2: Amazing Science in Everyday Life

021 Why are snowy days warmer?
022 Why is warm tap water cloudy?
023 Why do athletes drink electrolyte drinks?
024 Why does eating a tangerine after brushing your teeth taste sour and bitter?
025 Why does a mosquito bite itch?
026 Why does the wind blow so strongly between buildings?
027 Why do I cry when I cut an onion?
028 Why do I get a fever when I have a cold?
029 Why do cut apples turn brown?
030 Why do we get motion sickness?
031 What does it smell like when it rains?
032 What is the principle behind the various colors of fireworks?
033 Why can't I sleep when I drink coffee?
034 Why does soup appear when you eat Jjajangmyeon?
035 Why are leaves green?
036 Why do earthworms crawl out when it rains?
037 Why does it smell like poop when I step on a bank?
038 Why do we snore?
039 What would happen if there was no air in the world?
040 Why do I look different in the mirror and in photos?

PART 3: Fun Science in Everyday Life

041 Why do the clock hands turn to the right?
042 Is it okay for people to be exposed to pesticides?
043 Can you pop a balloon with an orange peel?
044 What are the chances of being struck by lightning?
045 Why does my skin get sunburned?
046 There are people who sneeze when they see sunlight?
047 Why do I feel depressed on rainy days?
048 Why do I fart when I eat sweet potatoes?
049 Why does my body feel like it's floating when I go down an amusement ride?
050 Why does your voice change when you breathe helium gas?
051 Why does static electricity occur?
052 Does everyone have a different perception of the taste of cucumber?
053 Why do we hiccups?
054 Why do crustaceans turn red when cooked?
055 Why does paper wrinkle when it gets wet?
056 Why does it tickle less when I tickle myself?
057 Why is poop brown?
058 Why don't animals get cavities if they don't brush their teeth?
059 Blood is red, but why are veins blue?
060 Why is bird droppings white?

PART 4 ​​Science in a Grateful Life

061 Why doesn't an umbrella get wet when it rains?
062 Pizza is round, but why are pizza boxes square?
063 What is the principle of sunglasses?
064 Why turn powdered medicine into tablets?
065 Why do I see better when I wear glasses?
066 Why doesn't my skin get sunburned when I apply sunscreen?
067 How does a hot pack get hot?
068 Why is the inside of the cookie bag silver?
069 Are all germs bad?
070 Why does a wound heal when ointment is applied?
071 Does the copper film on elevator buttons really have an antibacterial effect?
072 Why do we drink milk when eating spicy food?
073 How does a lie detector work?
074 How can I tell the temperature with a thermometer?
075 How to put out a fire with a fire extinguisher?
076 What is the principle of deodorant?
077 How to revive soggy cookies?
078 What is the principle behind the candy that pops in your mouth?
079 Why should I get the flu vaccine regularly?
080 What is the principle of X-ray?

PART 5: Science in Convenient Life

081 Hand sanitizer, is it okay to continue using it?
082 Does the mask have a front and a back?
083 Why are teeth covered with gold when treating cavities?
084 Why are airplane windows round?
085 Why does my whole body feel warm when I wear a scarf?
086 What is the principle of perm?
087 Why do we spray deicing agents when it snows?
088 Why is the rooftop of the building green?
089 Why are all the road signs green?
090 How does a microwave oven heat food?
091 How does soap clean your hands?
092 Why are the ends of paper cups rounded?
093 Why are all manhole covers round?
094 Why is fried food crispy?
095 What is the principle of a thermos?
096 Why is the shape of a honeycomb hexagonal?
097 How do automatic door sensors recognize people?
098 What is a doping test?
099 How does iris recognition work?
What is the principle of the 100 barcode?

Science vocabulary that's as fun as you know it

Meet science with 100 questions relevant to elementary school life!
Why is bird droppings white?
What is the principle behind the popping candy in your mouth?

What secret lies behind those popping, mouth-watering candies that kids love? They're made by quickly solidifying sugar water with a generous amount of carbon dioxide, creating these delightful candies.
Why do water droplets form in a glass of cold water? The cold temperature around the glass causes water vapor in the air to liquefy.
In this way, children will naturally understand the meaning and principles of gases, liquids, and substances through this book without having to explain them in difficult terms.
The most important thing in science is to never let your curiosity die down.
It teaches us about matter, objects, our bodies, light, heat, and force through 100 questions that children have wondered about at least once in their daily lives.
You will discover that science is hidden and useful everywhere in our lives.


This is the first time I've seen such an easy and harmless educational cartoon!
From delightful illustrations and friendly explanations to must-know scientific vocabulary.

“Is there a book my child can read for the first time?” “I don’t even touch a science book.” Mothers are anxious about starting elementary school science classes.
At the same time, I wonder if there is an educational comic book that is easy to understand but free of useless puns.
This book is for those parents and children.
As you follow the harmless and cheerful illustrations of Ikjong Lee and the friendly explanations of Donghoon Lee, you will naturally come to understand scientific principles.
The 'Learn More' corner will help you resolve any questions you may have and help you practice scientific thinking by connecting it to your daily life.
Even in ‘Science Vocabulary That’s as Fun as You Know’, concepts aren’t explained in a rigid manner.
Ease your child's worries about science studies with this book that turns the question marks in their heads into exclamation points.