Okay kiddo, do you like playing with computers and making things on them? Well, some people have really cool ideas of things they want to make on a computer and they want to protect their ideas so that no one else can copy them. That's where patents come in. A patent is like a really special sticker that you put on your idea, and it says that no one else can make the same thing without your permission.
Now, sometimes people want to make things on computers that are really special and unique, but they don't know if they can get a patent for it. That's where the EU Directive on the Patentability of Computer-Implemented Inventions comes in. It's like a set of rules that say what types of things you can and can't get a patent for when it comes to things you make on a computer.
So, basically, the EU Directive helps people who make things on computers get special stickers (patents) for their cool ideas, but it also makes sure that people can't just get a patent for things that aren't really that special. It's like a guide for how to decide if something is cool enough to get a patent or not.