George Pal's stop-motion allegory in which mechanical Screwball soldiers invade a peaceful Dutch tulip land.

Public domain (US): Published 1942; copyright not renewed (listed in Wikipedia 'List of animated films in the public domain in the United States', source: Hurst, Film Superlist 1940-1949). Source: Internet Archive (https://archive.org/details/george-pal-presents-tulips-shall-grow).