Place it after a puzzled reply in a short edit, then follow it with Baby Laughing Meme to keep the joke moving, and close with a second reaction sound for a tidy finish.
關於此聲音
This is a three-second clip of playful baby-style babbling that repeats a soft gugu gaga in a high, cheerful voice. It feels cute, silly and lighthearted, like a tiny voice joining in with a giggle, and it works best as a gentle tease rather than a loud joke.