On sale date based on the copyright date of May 1, 1936 from the 1936 Catalog of Copyright Entries Part 2 Periodicals.
0.8 x 4
0.2 x 4
Per info in Michael Barrier's Funnybooks The Improbable Glories of the Best American Comic Books, Gaylord Du Bois likely adapted the Big Little Book story for comics which would have been one of Du Bois' earliest comic book assignments.
0.7 x 3
0.3 x 3