mattel electronics - synsonics drum test 1

YouTube via snoopyoverthehills | May 23, 2010
Not seeing a part 2.
"just plugged in my new mattel drum computer and played around. quite funny :) and its made by mattel - f... barbie!"

via this auction

Note the Midwest Analog Products ADV-MIDI Assembly Guide below.

"This unit was produced in 1981 (!) and is a sought-after collector and Circuit bending object... All Pads are pressure dynamic"

inside a Mattel Synsonics.