There are more than 20,000 summer camp available throughout the summer in USA. You can start to look into college summer camps that opens to international students. Almost all colleges and universities offer some sort of camp, not to mention college credit courses. Your relatives' two kids might want to search with some ideas such as location, college, type of programs, and etc. If you are having a difficult time to find out proper ones, you can reach out to some of consultants to help you out.
