B.C.
Orthotics and/or shoes with arch supports are expensive, and to be buying them for feet that are still growing is going to cost you a fortune. At 3, his feet and his gait (how he walks) are still developing. Just potty training and not wearing diapers anymore makes a difference in how they walk. Keep an eye on it, but I think it's too early to be worrying about it yet. If he's having problems running, skipping, jumping, etc when he's 5 or 6, then take him to a podiatrist and see what they have to say.