Wandel durch Handel is a German phrase that means "change through trade." It means that when countries trade with each other, they can change for the better.
Imagine you have some toys at home that you don't really like playing with anymore. But your friend has some toys that you really want to play with. So you decide to trade your toys for your friend's toys. Now you both have new toys that you enjoy playing with more. This is kind of like how different countries trade with each other.
When countries trade, they can exchange goods like food, clothing, and electronics. This can help them have access to things they might not be able to make themselves. For example, if a country can't grow bananas because it's too cold, it can trade with another country that can grow bananas. This way, people in the first country can have bananas even though they can't grow them themselves.
When countries trade, they can also learn from each other. They can see how other countries make things, and this can help them improve their own methods. It's like seeing how your friend plays with their toys and learning new ways to play with your own toys.
Overall, Wandeln durch Handel is about how trading with other countries can make the world a better place by bringing new goods and ideas to different places in the world.