Last summer, I made my grandmother an embroidered potholder for her July birthday using this tutorial by Maggie Makes. (These pictures were taken last summer in Vermont, hence the bright sunshine and green grass in the background. Sadly, Maryland looks nothing like this right now.)
The potholder is lined with ThinsulBrite and embroidered with variegated floss I found at a thrift store in Austin before we moved. I love how the potholder turned out so much that I'm currently putting together another one for myself.