A cell is like a tiny building block that makes up everything in your body, just like how tiny LEGO pieces build a castle. Each cell has its own job, like some are in charge of making energy, while others help you grow or heal. They are so small that you need a special tool called a microscope to see them.
Think of a cell as a little factory. Inside the factory, there are lots of workers and machines. The workers are called organelles, and each one has a special task. Some make energy, some build things, and some clean up waste. Together, they keep the factory running smoothly, just like all the organelles keep the cell working.
A cell is also like a tiny city. It has a city wall called the cell membrane that protects everything inside. There are roads for transporting materials, and even a mayor’s office called the nucleus that makes important decisions for the city. The nucleus holds all the instructions, like a recipe book, that tells the cell how to do its job.