Roy Williams + Obscure Mickey Mouse Gag = Mouse Ears
Inspired by a gag in ‘The Karnival Kid’ (1929) where Mickey tips his ears like a hat, 'Mooseketeer' Roy Williams came up with the idea for The Mickey Mouse Club's Mouse Ears caps.
Disney would sell 2 million Mouse Ears in the show's first 3 months...and who knows how many since!