Good old-fashioned gentle bottom tapping
Speed and force of pat-pat customizable to liking 
Linked with Pat-Pat Assistant mobile application (download here)
 
Standard size of 19.0 x 15.2 x 48.2 cm (L x W x H)
Size of Pat-Pat Mom and hand is fixed
Lightweight and portable for carry and use anywhere
 
Comes in Pat-Pat Kit that includes:
1 x Pat-Pat Mom 
1 x charger/power cable
1 x user manual
3 x starter dresses for Pat-Pat Mom
(see Wardrobe category for more options)