Boxes remaining are now three. The final box proved too much work to take care of four individual Arduino operated circuits.

Spent 3 weeks trying to figure out how to fix the circuits whenever a MP3 component is added. Only found out the mistake was the lack of voltage lost when going through the breadboards.

Spent days trying to figure out how to fix it, from creating my own circuit to adding additional sources of power for the circuits.  - No results.

In the end, all thats left to be done is to setup the entire exhibition with three boxes, the lighting, micro-servo, and ultrasonic work flawlessly fortunately.