Thank you to Jo Sims for sharing this project from the 2014 Festival of Quilts children's workshops.
You can find more templates to use for book mark shapes at Homemade Gifts Made Easy. Just make sure your template is not larger than the book you want to use the book-mark in.
You can also find tutorials for embroidery stitches on the Hand Stitching section of the YQ website.
Felt Book-marks (194kB)Felt Book-marks