Okay kiddo, so a long time ago, before you were born, something happened that was called the Great Depression. Imagine your piggy bank, you know how you save your money in it? Well, back then many people had piggy banks too - but they had a lot more coins and even bills in them. They used that money to buy things that they needed like food, clothes, and toys.
But one day, something very bad happened - the economy of the whole country got very sick. The economy is like the piggy bank of a whole country because it holds all the money that people have saved and it helps people buy and sell things. When it gets sick, people start losing their jobs, and they can't buy the things they used to because they don't have any money.
Many people lost their jobs and their homes, and they didn't have any money to buy food. It was a very hard time for everyone, and it lasted a long time - almost 10 years! People had to find ways to survive, so they would stand in long lines to get free food from soup kitchens or charities.
Even the stores closed because they couldn't sell anything since people didn't have any money to buy things. It was like a large chunk of money disappeared from everybody's piggy banks at once. This made things even worse because businesses, without money coming in, had to close down and many people lost their jobs.
The Great Depression was a very sad and hard time for a lot of people. But it taught us to be careful with our money and to make sure we always have enough saved for emergencies, just like how you save your coins and bills in your piggy bank.