For Easter this year I made my little niece and nephew matching Easter bunny shirts.
I made my stencils on my silhouette machine with contact paper (vinyl), it makes it a lot easier to paint as you don't need to worry about the stencil moving.
The super cute bunny image on the top shirts is from the blog Petti Bear - although the intended use is as a wall sticker. I think it is great for tshirts too :)
The bunnies on the bottom shirts were from the Silhouette Online Store - unfortunately I didn't iron the paint properly and some of it washed off. Luckily it still looks cute :)