Set its Material to or Plastic and its Color to white. Add a ClickDetector :

Change its Size to look like a thin sheet (e.g., 1, 0.05, 1.4 ).

Use the following logic to open the GUI for the player who clicks it:

In the Roblox game , "Papers" are lore-filled items scattered throughout the facility that provide tips and secrets. How to Create a Paper (Roblox Studio)