Imagine you are playing with your toys and you have a basket full of candy. Your friend wants some of your candy but you don't want to share all of it. So, you make a rule that your friend can only have some of the candy if they give you something in return, like a toy or a picture they drew.
The government in England did something similar a long time ago with corn (which is like a plant that makes food we can eat). They made a rule called the Corn Laws. These laws said that people in England could only buy corn (and other food made from corn) from certain countries. This made the price of corn really expensive, which was good for the people who grew corn in England because they could charge a lot of money for it.
But this was bad for everyone else in England who wanted to buy corn to make their own food. They had to pay a lot of money for it, and this made it hard for them to afford other things they needed, like clothes or toys. Imagine if you had to spend all your money on candy, you wouldn't have any money left to buy new toys or clothes.
People who didn't like the Corn Laws tried to get rid of them. They thought that everyone in England should be able to buy corn from wherever they wanted, not just certain countries. Eventually, after a lot of arguing and protesting, the government got rid of the Corn Laws and everyone could buy corn for a fair price.