A vitamin is like a special ingredient that your body needs to grow big and strong. Just like how you need different foods like fruits, veggies, and meats to stay healthy, your body needs different kinds of vitamins to work properly. For example, vitamin A helps you see in the dark and keeps your skin and hair healthy, while vitamin C helps your body heal when you get a cut or scratch. Some foods like carrots and oranges have lots of vitamins in them, but sometimes you might need to take a special medicine or supplement to make sure you are getting enough vitamins to stay healthy.