First start with a plain long sleeve shirt. This is another shirt I got from old navy for 97 cents!
Next, cut straight up the middle of the shirt.
Choose some sort of embellishment. I got his trim at Jo-ann fabrics. I only sewed it to one side of the shirt, because I thougth that was cute! You could do it on both sides if you wanted!
Finished product! Cut little accessory cardigan. These are sooooo simple! There are so many different ways you could do this too. Check out my other Plain Tee into Cardigan Tutorial.