Teething Biscuits

Baby Teething Crackers - Recipe yielding about 15 servings. Made with corn meal and whole wheat flour.
Baby Teething Crackers from iChef - Hard biscuits using whole wheat flour.
Italian Teething Cookies - In Italian, these cookies are called "Ossi Dei Morti" or bones of the dead. They are hard cookies, but they are used for teething babies. Adults like to dip them in cappuccino.
Teething Biscuit - Recipe for teething biscuits using shortening and baby cereal, no flour.
Teething Biscuits - Simple recipe using flour, baby cereal and juice.
Teething Biscuits - A baby version of overnight sugar cookies.
Teething Biscuits from France's Kitchenette - Many recipes for teething biscuits, rusks and crackers found on the web, in magazines, and in books. Also suggests egg substitutes.
Teething Cookies - Recipe using sugar, flour and eggs. Needs to rest overnight before baking.
Zwieback - A twice baked teething rusk.