Medieval Book Containing 800-Year-Old Doodles

Historian Erik Kwakkel finds and catalogs medieval doodles in some of the oldest books. Is this conclusive proof that being bored in class is of all ages?
Doodle by bored school boy. A 15th-century doodle in the lower margin of a manuscript containing Juvenal’s Satires, a popular classical text used to teach young children about morals. Photo: Carpentras, Bibliothèque municipale, MS 368.