My niece asked that I provide a photo booth for her wedding..
backup camera, set on manual focus, aperture priority f3.8 matrix meter, timer 10sec.
flash on cord, remote trigger.
used foam-core to make a "box" around the camera covering every button, knob or dial.
used a tube of paper to "extend" the timer light to the front of the box.
The sign said
pick a prop
push the red button (painted the trigger red)
get behind the line and make a happy face.
it was a "hit"