Cycling, yoga and leg stretch exercise helps in increasing height. Eat nutritious food, dairy products like milk,  yogurt, nuts and proteins like egg,  poultry etc. Have adequate exposure to sunlight in mornings helps our body to produce adequate vit-D thereby increasing calcium absorbtion from diet you are having. Prefer going more to outdoor games than indoor. Have good adequate sleep. Having good sleep helps our glandular system to work better. Height depends on hereditary factors but doing exercises and cycling helps you gain height. If you are going to gym tell your gym instructor about your requirement. Not every exercise increases height but specific exercises helps you.