While the exact Scott Cawthon original cannot be legally redistributed without credit, Zapsplat offers an identical sounding track called "Retro Arcade Kids Cheer."
When Cawthon was developing the original FNAF on a tight budget, he utilized royalty-free asset libraries for his audio design. He took this standard, cheerful stock asset and placed it at the end of a grueling, terrifying six-minute night shift. Why the Sound Effect Became a Legendary Gaming Meme fnaf kids cheering gaming sound effect hd link