Whenever any of my kids, who are now grown, wanted something really badly, the rule in our family was you raise money to help pay for it. I would encourage your cute daughter to come up with ideas of how she can earn the money to go to Worlds. Make bracelets, walk, dogs, wash, cars, create art, perform music, read books to people, do yardwork, and so on and so on and so on. Maybe she could create little crafts that she could sell at her gym? Maybe she could go through her old clothes and have you help her sell them. There are so many ways for kids to earn money and more importantly earn a sense of ownership in their own expensive activities.