If you're an American who learned to read in the 1970s or early '80s, you're likely well-acquainted with Frog and Toad, the series of acclaimed easy-reader children's books by the late Arnold Lobel (the first, Frog and Toad Are Friends, earned a Caldecott Honor; the second, Frog and Toad Together, a Newbery Medal). However, you're probably not familiar with Batman and Joker Are Friends, a video that introduces the two arch-enemies into the Frog and Toad story "The Letter"; the result is, appropriately, both melancholy and heartwarming.

"Doing superhero voices for my son and a love of Frog and Toad led to this riff on an Arnold Lobel classic," Harry Bauer explains of the video, in which he draws a Joker and Batman over Lobel's figures (his voice work is pretty good, too).