I was asked for a Batman hat sometime last winter, but never really got around to making it since it was requested as a sun hat. Luckily the requester has a summer birthday:
I used some slightly stiff material that I don’t really know what it was and three strands of embroidery floss to create a patch to put on a sun hat found at Children’s Place. I created the bat first, then filled in the yellow around it to create the oval. I trimmed the excess material and closely blanket-stitched the patch into place. A nice, quick, gift idea that can be customized to the interests of the recipient.