Well, imagine the United Kingdom is a big house with different rooms. Each of these rooms represents a different part of the UK, such as England, Scotland, Wales, and Northern Ireland.
Now, imagine that the UK government used to make all the decisions for every room in the house. But some people in the rooms didn't like this, because they thought the UK government didn't always understand their needs and wants.
So, the UK government decided to give some of the rooms more control over their own decisions. This is called devolution. It means that the rooms, or the different parts of the UK, can make some of their own choices about things like education, healthcare, and transportation.
For example, Scotland now has more control over how it runs its schools, its healthcare system, and its public transport. This means that the people of Scotland have more say in how things are done in their country.
Devolution is a way to make sure that each part of the UK can have a say in how it is run, and that the government can better understand the needs and wants of the people who live there.