A method for allowing a human subject having a mouth to time a predetermined duration, the method comprising: initiating a first oral sensation in the mouth of the human subject to indicate a beginning of the predetermined duration and initiating a second oral sensation in the mouth of the human subject to indicate an end of the predetermined duration, the second oral sensation differing from the first oral sensation. Initiations of the first and second oral sensations are separated in time by substantially the predetermined duration. Also, an oral timer for performing the method and a kit including a plurality of the oral timers.
