Year of Learning: Lesson #36 Doughnut holes are made of the same thing as the hole in your toilet seat, but nobody ever publicizes that. Megan Coughlin Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Pinterest (Opens in new window) Pinterest Share on Tumblr (Opens in new window) Tumblr Share on Pocket (Opens in new window) Pocket Share on Reddit (Opens in new window) Reddit Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Like Loading...