Mycousin is 14 yearsand she is around 154-156cm tall.i learned that it is possible to increase height, andwhat excercise do you recommend for her?

Height is genetic: Most people reach their maximum height in their late teens. Without nutritional problems or chronic childhood illnesses, height is largely based on genetics and parental heights. Aside from eating right, exercising, sleeping well, and being happy, there's not much a person nor his doctor can do to increase height. However, one should eating a variety of healthy foods and exercise 3-4 times a week.