This is from Nursery rhyme "Strange Biscuits" (famous in japan). The number of biscuit on Web site is increase by tapping a pocket.
-obniz power source - USB adaptor or battery
-Acceleration sensor - KXR94-2050
Connect a power source and acceleration sensor to an obniz.
(obniz) : (Acceleration sensor)
-0 : 1 (Vdd)
-1 : 3 (GND)
-2 : 6 (X)
-3 : 7 (Y)
-4 : 8 (Z)
-5 : 2 (Enable)
-6 : 5 (Self Test)
Insert this circuit to your pocket this direction.
Access this website and tap your pocket. The number of biscuits is increasing.
Keeping gap between pocket and you will improve sensitivity.