Caillou is a Canadian animated children's series that first aired in 1997, following a four-year-old boy whose everyday frustrations often end in tears. Long after its original run, clips of his crying voice began circulating in French and English meme edits, where the sound was detached from its gentle educational context and reused as shorthand for childish complaining. Its staying power comes from instant recognition: even viewers who never watched the show closely recognise the whine, making it a quick, wordless way to label someone as overreacting.