Plans are like maps that show you how something should look. They can be made on paper or on a computer. People use plans to design buildings or things like cars, planes, and even video games.
There are many different types of plans, but they all have a few things in common. First, they use symbols to represent different things. For example, a square with an X in it might mean a window, and a circle with a line through it might mean a door.
Another thing plans have in common is that they show things from above, like you were looking down from the sky. This means that everything is flattened out and you can see all the different parts that make up the thing you're designing.
Plans can be really helpful because they let you see what something will look like before you build it. This way, you can make sure it will work properly and look good before you spend a lot of time and money on it.