Place it as the punchline after a setup with a pouting adult, then follow it with a baby laughing meme, or lead into it from goofy ahh sounds when the opening needs an extra childish cue.
關於此聲音
This is a short vocal clip of about ten seconds built around the repeated baby-talk phrase “gugu gaga,” delivered in a playful, silly voice. It feels funny and deliberately childish, turning a moment into a mock-innocent joke. The simple phrase lands instantly, making the listener picture a babyish, unserious reaction even without any other context.