Reproduction would depend on how much time and money you wish to spend on the project. You could provide prints or give them CDs and let them get their own prints made.
For archiving I would recomend videotape, or a magnetic backup tape. They are much less suceptible to degradation over time than either CDs or prints from most current computer printers.
One note, dye sublimation (spelling?) process printers are projected to last longer than ink jet produced prints. Not sure how accurate these projections are as most of these processes are fairly new so any projections are just that, projections.
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