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This article contains plot details from the latest books.
Thinking Caps are a type of hat that takes that takes the appearance of a smurf's hat, and is used to preserve the integrity of the tests during Midterms and Finals. It is made of a thick white cloth that goes around a prodigy's head and into a point, as well as an amalgam of metals, that dull telepathic abilities. It doesn't work on Sophie which amazed Tiergan to the point that he instantly gave her a hundred on her telepathy midterms. Variants of this product have been created as shown through both the hat the ogre rebels used as well as Vespera's own piece on her head.