Hi, thanks for writing to HCM.
Before going for any treatment for the childs deformities, a thorough evaluation is necessary to know the cause for producing the deformities in the limbs
The best known method to correct deformities in the limb is ILIZAROV PROCEDURE. Infact, the whole construct will be very cumbersome for a child to tolerate.
Consult a pediatric orthopedic surgeon for a detailed workup and management.
Hope this information is helpful. Good day