How do I ready for a fashion show as a kid?

I would suggest not going overboard. I understand that you want to look pretty, but don't overdo it. If it's an evening event, opt for darker colors like navy, grey or black. They look more sophisticated and grown-up. Maybe go for a dress with black tights, or for a pair of black pants and a stylish blouse. Don't forget the shoes. Shiny black shoes or flats are the best option. If it's a daytime event, choose lighter colors, for example creme or white. Try something like a white dress with a darker jacket or patterned pants and a white t-shirt. When you're looking for shoes, I suggest choosing something darker, because it will balance your light clothing out.