One of my original creations, the Tickling Diaper. Partially inspired by the "Tickle Belt" from Spongebob Squarepants, the Tickling Diaper is essentially the same thing, but with a diaper. However whereas the source of tickling from the belt is unknown, the interior of the diaper is covered in feathers and, when activated, tickle the gentialia/midsection region of the victim. Who else to start a revolution of something new than with a character who is often a subject of fetish art? Amy Rose?
The origin of the tickling diaper came from this chapter on writing.com about Amy being diapered, with the tickling diaper as one of the brands. The chapter can be viewed here:[link]