Cartesian Genetic Programming (CGP) is like a game, where you try to create a computer program using special pieces of code. The pieces of code are called 'genes', and they're like little building blocks that you can connect together to form a program. Each gene has a different shape and can do different things. When you put all the pieces together, you create a program that can solve problems or do tasks. In CGP, you have thousands of genes that you can try out and the computer will help you figure out the best combination of them to create a program that can solve the problem.