[urltargetblank]http://www.nflshop.com/product/index.jsp?productId=13189181&cp=716699.2954352&pageType=family&lmdn=Size&parentPage=family[/urltargetblank]
The above link is for the NFL pro shop. They do customizable shirts. The only one I found that can be done in Pink at that age group (2T, 3T & 4T) was the short sleeved tee. You have a menu of options for how you want it to look. You can choose from different seahawks themed logos, such as the word seahawks, a seahawks helmet or just the logo, you can have players name and numbers put on or just make up a number and name that you like, whatever. Not sure if this is what you are looking for but hope it helps.