Club Penguin Puffle Shirts

We have been searching for shirts to buy but haven't had any luck.  Since the boys really like the Puffles I figured I would try make my own shirts.  I think they came out pretty good for my first time using real  T-Shirt Vinyl. It seemed harder than I expected so I have a feeling I may not have been doing it totally right.  I guess this is one of those times when I probably should have read the directions!