Your daughters are good swimmers. You should give them the best possible swimming club. My son start swimming at nine yeras old. Swim for high school and ivy league college. One rule of becoming excellent in any sport is 10,000 hours of trainning. You can figure how many hours of training per week ( including saturday and sunday) when they reach 17 years old ?? Swimming is a boring sport and if the child is good, it will bring so much joy for the parents when the child compete in swimming meet. Good luck for the new swimming club. Florida has very good swimming club.