You can try a consignment store or taking the items back and seeing if they will let you exchange them for girl items.
Here in Fort Wayne we have a baby store "Once Upon A Child" where you can sell baby items and get cash. Or try craigslist foe your local area
Ebay maybe? Or you could bring them into a thrift store. It's like a second hand store that people bring in there used items to re-sell to others.
Okay thx ladies. Its brand new clothes it still has all the tags maybe I'll try bringing them to carters and see what they will take back.