Place it at the end of a reveal sequence in your edit, after a shocked sound to show the reaction turning playful. Follow it with the oh no no no laugh when the joke escalates, or leave it as the final beat after a prank.
About this sound
A short 1.3-second clip of a young girl's high, bubbling giggle, with no words or music behind it. It feels sweet, cheeky and instantly light-hearted, like a child trying not to laugh at something silly, which makes it land as an innocent, playful reaction rather than a big laugh.