My 6 year old son also complains of legs aches 3-4 times a week. Our endo doesn't say that any other patients complain of this problem. We took Cody to a foot/ankle specialist because he is also pigeon toed. He has been fitted with orthonics. This doctor says that his feet turn in because the muscle can't grow as fast as the bones are. Cody is in the 90% for his height, but he also says that he shouldn't have legs aches. My husband sees a chiroprator. One day Cody just tagged along to spend some time with his dad. My husband asked him about his constant leg aches. He said that doctors really don't acknowledge leg aches or attribute them to growing pains. He says childrens legs shouldn't hurt. He looked at Cody and said that his lower back was out of place which threw his hips off. My husband let him adjust him. I was furious when I found out, but do you know that the legs aches stopped after that. Twice we noticed after Cody has fallen pretty hard that the leg aches come back. Cody has even commented on the difference. I know a lot of people don't beleive in chiropractors, but we believe he has helped our son.