I'd buy one of those right aways, and hook it to 2 pvc cylinder, one with flour, the other one with compressed air (100psi), and link the board to a solenoid valve.... :P
So, the boom isnt just a beep.... its a cloud of flour...lol
Or, anything could replace the "flour":
- "bust disks" (for a loud bang)
- confettis
....
__________________
|