Conversation so far:
What films did Marx Brothers make while at Paramount?
Their first two released films (after an unreleased short silent film titled Humor Risk) were adaptations of the Broadway shows The Cocoanuts (1929) and Animal Crackers (1930).
Did the Marx Brothers have any additional projects after The Cocoanuts and Animal Crackers?
Their third feature-length film, Monkey Business, was their first movie not based on a stage production.
Was Monkey Business a popular Marx Brothers film?
Monkey Business was a critical and box office success, and is considered one of the Marx Brothers' best and funniest films.

Question: Is there any interesting information?
Self-contained rewrite: Is there any interesting information about the Marx Brothers?