I printed out her peeps pattern about 50% smaller than the original (it turned out to be approximately 4" tall), and then traced the peeps onto freezer paper.
After I ironed the freezer paper onto the shirt I was able to paint the peeps. I wanted light pink to match the "real" peeps, but my store was out of that color. I ended up using Tulip Soft Fabric Paint in Azalea Matte and Sunshine Yellow Matte. The font for "Hello, Peeps" is Candara (100 pt size) and the paint is Ebony Black.
After a few hours, I peeled off the paper (so fun!!). Here are the peeps without eyes and a nose :)
(Ebony Black for the bright pink and Chocolate Matte for the yellow)
I bought a size Medium for Hannah, even though she only wears a small. I think she'll actually fit it for a few more Easters!
Here's my girl!! (now if only her skirt was pink... or yellow)