I was cleaning the basement this weekend and came across a neglected treasure that I completely forgot I had -- a couple of 65+ year old point & shoot cameras my grandfather brought back from West Germany while stationed there in the '50s. Two cameras, some filters, leather cases, some flash component, etc. They look pretty cool, but I'm not sure how functional they are.

The idea came to me -- I would love to photograph my children with the same cameras that took photos of my mother and possibly me as a tyke. I've no clue what to even look at to determine if they're useful, what I'd need for film, or even if there are still reputable places to send film for processing.

What are the best resources you camera/photography enthusiasts here can recommend for starting to check these things out? I don't care about their potential value, regardless of what it is, but would really like to figure out if they can actually be used with even pretty decent results.