Hello... from the info you have given me... it appears that child has less than adequate development. However all is not lost yet. She still has adequate scope for improvement . It will require disciplined approach toward the diet and exercise . Give her plenty of fruits and nutritious foods and reduce the junk food consumption. Increase her protein content by adding egg or dal In her diet. Pediasure is a good protein supplement. Add a tsp to milk and give it twice daily. As far as leg pain is concerned, because of fast bone growth at this age some pain is normal. But if it very high then syrup paracetamol (15mg/kg) will suffice. Sup calcimax p 5ml two times a day is advisable .