Slides are a set of key items that appear in Kingdom Hearts. They are six slides that are used for projecting images.
Sora wants to know if Tarzan has seen Kairi or Riku so Jane tries to use imagery in an attempt to communicate with him. Thus, Sora fetches six slides that Jane puts into her projector to showcase the images against a screen. One of the images depict Hollow Bastion and Sora claims that the place is familiar, despite the fact that he has never been there. His déjà vu is due to the memories of Kairi's heart sleeping within him.