Trippet's is a great family friendly store. When you walk in you are greeted by a worker who will help you with whatever you need. While you look the kids can play in the play area or watch a video, then when it's time to try on shoes the worker's are pros at checking sizes. They can even suggest little tricks to make the shoes fit better.
They also have a frequent shopper card, which allows you to get your 12th or 13th pair for free and it never expires. When you check out you are entered into their system and they will send reminders to bring your kids in for a sizing, which is helpful for any mom who has suddenly realized her sons toe is curled at the end of his shoe.