Meet our Mega Cog. This Kaiko fidget spinner has a super fast spin & super subtle vibration which is amazing. Rolling the cog over hands and fingers also gives great sensory input. Some like the way it "tickles" when spinning.  It is pocket sized, quiet and discreet, making it perfect for use anywhere.  Amazing for those who need constant movement to focus and to keep hands busy.  A firm favourite for most. Suits any size hand.