J.R.
Have you looked at Once Upon A Child in Flower Mound? It's on Main street at 2311 CROSS TIMBERS #317. I bought a beautiful dress my my little girl for my brother's wedding. The wedding was postponed, so I had her wear it at her dedication, and got lots of comments about it. I haven't snooped around in the boy sections too much, but I have a friend who has a little boy, and she's found some great affordable outfits for him there!
Good luck!