The concept is simple: Swap out the cute sounds on this toy police car with audio relating to police brutality. Speeches, court recordings, 911 calls, etc.
Video of the unmodified car:
Power supply for amp and Raspberry
Access to original soundtrack
Figure out IO hookup and programming (Python or web audio api?)
Dusty but beautiful!
The gramophone input will be a good place to hook up the Raspberry Pi.