the younger kids will love harpo and the tweens will love groucho being a smart alec. plus, it's only an hour long, so that helps them get over the whole black-and-white of it all ...
My son (9) and I just watched 4 Marx Bros movies on TCM. He is now a confirmed fan. He enjoyed the comedy and was amazed at the musical skills of Harpo (harp) and Zeppo /(piano). Also thinks Groucho is 'cheeky'.
Lovely old fashioned family fun.
My grandfather showed me the marx brothers movies and i loved them right away, they are amazingly funny. Duck Soup is a good movie cuz it has a lot of Zeppo, and he isnt in a lot of the other movies.