One question, will parents be present at all?
I think one nice thing, if you could do it (I'm assuming group size wouldn't make it a problem), is a little, very basic leaflet or just an A4 sheet going over the main points as simply as possible. Just home printed, nothing expensive, but if a few are interested then they may treasure a little sheet to have a read of. I know they may need help but hopefully they will have a willing parent to help.
If parents are present, I can see you being asked about recommending cameras, or maybe even books, so it may be worth having literature on where to look, the differences in compacts vs basic bridge cameras, something just to help if possible.