Imagine you have a lemonade stand. You sell your homemade lemonade to your friend for a dollar, and your friend gives you the dollar. You use the dollar to buy more lemons and sugar to make more lemonade.
Now, imagine this happening on a much bigger level. Instead of you and your friend, there are millions of people buying and selling things. This is the circular flow of income.
People earn money (income) by working at their jobs. They use this money to buy goods and services, like groceries, clothes and movies. Businesses use this money to pay their workers and buy supplies. They also pay taxes to the government.
The government uses the tax money to pay for things like schools, roads and hospitals. The government also buys goods and services from businesses.
This cycle keeps going round and round. Money flows from people to businesses and back to people again. It also flows into the government and back out into the economy.
The circular flow of income shows how everyone in an economy relies on each other. Without people earning money and spending it, businesses wouldn't make money. Without businesses making money, people wouldn't be able to find jobs. Without taxes, the government wouldn't have the money to pay for important things like schools and hospitals.
So just like selling lemonade to your friend, the circular flow of income is a way that everyone in the economy can help each other out and keep things running smoothly.