A city is a big place where lots of people live and work. Think of it like a giant playground, but instead of toys, there are buildings like houses, stores, and offices. People walk or drive on the streets to get around and do different things like shopping, playing sports, or going to school and work. In some cities there are also big parks or playgrounds where people can go relax or play with their friends. But because there are so many people living close together, cities can sometimes be noisy or crowded, so it's important to be safe and respectful to those around you.