Both Apple and Google started with one idea!
A startup simulation for young people who dream of becoming entrepreneurs.

Felix, who found out the day before his mother's birthday, saves money by making a birthday card with a picture drawn by his neighborhood friend Mo and giving it to his mother.
But as word of mouth spread about its cost-effectiveness and orders for birthday cards began to pour in, Felix decided to start a business with his friends using this item.
Felix takes care of card production, Mo takes care of the art design, Ned takes care of website creation, and Ellie Mae takes care of accounting, and they establish a website called 'Card Mart'.
But this becomes a huge hit, and Felix becomes a successful CEO at the age of fourteen, but the company faces a crisis as large companies in the industry enter the competition...


The story of a middle school boy who has been interested in making money since childhood and who becomes successful by making and selling greeting cards with his friends.
It allows you to experience the challenges you face in running a business, from ideation to promotion, marketing, organizational management, tax issues, and even fierce competition with other companies.
Above all, it is a coming-of-age novel about self-realization and a textbook on entrepreneurship for young people, as it naturally helps them understand the meaning, value, and purpose of running a business.

When my father gave the card to my grandmother, she looked at it with an admiring expression.

“What a beautiful painting!” asked the grandmother.
“Where did you get this card?”
Felix explained that he had printed out a drawing his friend had made on his computer at home.

"If that friend is okay with it, can you give me a few, Grandma? These days, when I go to buy a card, the only ones I find are either poorly made or ones that everyone has already received at least once." --- p.13

Over the past few years, Felix has come up with some great business plans.
And Mo was involved in almost all of Felix's plans in some way.
At the age of six, Felix's first business was selling flower bouquets from house to house.
At that time, the mother's job was to make and carry bouquets.
Since then, Felix has planned and started so many businesses that it is impossible to count them all.
--- p.19

What has happened over the past few months has seemed like a dream.

Felix would come home from school, check his email, and if an order came in, he would address it in a secure envelope and pack the goods.
And I sent it off the next morning on my way to school.
I bought and stocked up on necessary stationery over the weekend.
And whenever I had a chance to be home alone, I printed out the cards I needed.

The money for the items arrived one after another.
Almost every day when Felix came home from school, there would be a brown envelope (or two or three) lying on the mat.
Felix picked up the envelope, went up to his room, and put the ten thousand won bills in the shoebox.
During the month of March, we were selling an average of about twelve sets a week, and by May, we were selling almost twenty sets a week.
--- p.53

Ned said that Felix seemed to have invented a magic machine that printed money.
It seemed like there was nothing in particular I was doing to make money.
We didn't advertise or go out to sell anything.
And yet… the orders kept coming in.
And brown envelopes kept arriving on the doormat.
Money continued to pile up in the shoebox until the next money sharing day.
This was truly… magical.

Felix wondered how long this situation would last.
Every day when I came home from school, I thought to myself that from today onwards, I might not receive any more orders and I might not see any brown envelopes on my mat.
It occurred to me that this whole situation could end suddenly and without reason.
As it was when this business started.

But things turned out very differently from what Felix expected.
--- p.54

“Well, I’m afraid we must conclude the class now,” said Mr. Hughes.
“Before we wrap up the class, I have one last question to ask.
There's something I often say in my business classes.
There are many people who have the strange belief that making money through business is not as valuable as other things.
Some people believe that business is not as respectable as other professions.
“In fact, the world depends a great deal on businessmen and the wealth they create.”
--- p.147

“We need to remember that the very fact that we can receive an education at this school is a result of the wealth created by businessmen.
The clothes we wear now and the food we eat are, in a way, provided by businessmen.
The books you read, the television you watch, and the theaters you go to see movies are all created by business people.
When you graduate from school, most of you will find jobs in companies founded by entrepreneurs.
Also, people who cannot find work, are too old, or are sick will receive pensions or subsidies.
That kind of money also comes from taxes paid by business owners.
“I’m talking about the money that businessmen like Felix, who are here now, have paid.”

--- p.148