Alexander SSW

Once upon a time, there are two little boys called Khi Khi and Tau who are brothers.  Khi Khi is 15 years old, while Tau is 8 years old. They were both brought up in a mysterious forest nowhere to be found. They are both stranded on this island looking for a way to get back to their parents, having no idea how they got here. Here is a long and big rock around a curcle.