X-Ray Goggles
The X-Ray Goggles are an object Greg buys in Diary of a Wimpy Kid: The Last Straw. He sees it in an ad with the Cash Machine, Personal Hovercraft, and Throw Your Voice Ventriloquism Kit. Despite the ad claiming the X-Ray Goggles can see through walls, metal, and clothes, Greg claims they just made him "blurry and cross-eyed."