I've seen this kind of thing done with single-use cameras, where each recipient is allowed to take 1 picture. If you use anything more complicated than a single use camera, make sure all recipients will be able to figure it out...something like a box brownie might need some instructions with it.
What we are using is the simple point and shoot cameras that use 35mm film and can be reused. A Brownie camera is not as simple and a lot of times uses different sized films. We are trying to keep it simple for the fun of it, are you interested?
Thy heart -- thy heart! -- I wake and sigh,
And sleep to dream till day
Of the truth that gold can never buy
Of the bawbles that it may.