Okay, so imagine you have a bunch of toys that you like to play with. You have a bunch of friends who also have toys. Now, let's say you and your friends want to start trading your toys with each other.
In Asia, there are a bunch of countries that have things they make and sell to each other. Some countries are really good at making cars, while others are really good at making clothes or electronics.
These countries have started trading with each other a lot, kind of like you and your friends trading toys. They buy and sell things to each other to make sure everyone has what they need. This is called international trade.
Some countries in Asia have become really good at making things that other countries want. For example, China is really good at making things like clothes and electronics. People from all over the world want to buy these things made in Asia because they are often cheaper than the same things made in other countries.
When countries sell things to each other, they make money. This is called the economy. The more a country sells and the more money it makes, the stronger its economy becomes.
So the economy of Asia is made up of all the different countries that are buying and selling things with each other. Some countries are really good at making things, and others are better at buying things. But together, they keep the economy of Asia running and growing!