Hi, Lisa!
I use Heat n Bond Lite. It can be purchased at most quilt shops & craft stores. It's a paper with iron on adhesive. Just draw the template shapes onto the non shiny side and follow the simple cutting instructions with a scissors. I use it often & love the product. I have been debating about getting The Farmers Wife's Sampler Quilt book. I read a sample of the letters on my Kindle. Sounds interesting. Hope I've been of help.