This is the circuit board and speaker from an arcade machine, we think. When you power it up, it flashes its lights and beeps & boops along. 3V seems to work ok for power. The different switches trigger different sounds.
Look, we made a video.
1/4" Chassis Mount Stereo Jack
12 pc. Alligator Clips
12 Station Barrier Strip / Terminal Block
12VDC Black Push Button Switch