The photocell coming from the underside of the seat to sense when somebody sits down

 The circuit/ rats nest, too afraid to clean it up and risk shorting it before the crit

 When the photocell senses no light or when somebody sits on the seat the 12v LEDs turn on

 The second output, the speaker works off of the same values of the input to trigger the movement and a great malfunctioning sound from the speaker(found object), at the same time the leds turn on.