black t-shirt (though gray would look good, too)
scrap of black knit fabric (I used an old t-shirt)
yellow fabric paint (or acrylic paint and textile medium)
Batman logo template (I found one here)
sewing machine (or you can hand sew)
Place your Batman logo on the paper side of the heat-n-bond lite and trace the oval shape. Cut out around the oval.Cut out the bat shape from the freezer paper, center it on the right side of your knit fabric (shiny side down) and iron in place.
Let the paint dry. This is the hardest part for me as I immediately want to rip the freezer paper off and see my amazing creation. Bad idea. This is a good time to do some laundry or wash dishes. Or if you're like me, you go to Target. When the paint is dry peel off your freezer paper. (I waited 24 hours.)
Remove the backing paper from the patch and center it on your shirt. Iron the Batman patch to the front of your t-shirt. (The textile medium I used said to wait 7 days before heat setting the paint. I waited 24 hours. I cannot wait a week to finish a project.) I covered the patch with a cloth so the paint didn't destroy my iron and pressed for 20 seconds.
Using a sewing machine and black thread (or you can stitch by hand), stitch around the edge of the patch.
I spent $4 for the t-shirt. Everything else I had on hand.