Fashion, or "fashi" for short, is all about the clothes and styles that people wear. Just like how some kids like to wear colorful shirts or sparkly shoes, grown-ups like to wear different things too!
There are many different types of clothes and styles that people like. Some people might like to wear clothes that are very fancy, with lots of frills and lace. Others might like to wear clothes that are more comfortable and casual, like a simple t-shirt and jeans.
Fashion designers are people who come up with new and creative ideas for clothes and styles. They might create fancy dresses or cool jackets that nobody has ever seen before. People who work in fashion also decide what colors and materials to use, and how the clothes should be made.
Fashion is always changing, just like how the seasons change from summer to winter. Sometimes one style is very popular, and then it might go out of fashion and a new style will become popular instead. It's like playing dress-up, but it's for grown-ups!