Cold buffet ideas

[PeppermintCream]

Background: DH is running some weekend workshops from home in the Autumn. I have offered to do the lunches. i was thinking that a cold buffet may be best, as I will also have a 6 week old baby, a two year old and a 4 year old to entertain.
Any suggestions for things I could serve (meat and vege options)?

Soup and crusty bread. Make big vats of it and freeze then just get out what you need as and when the workshops occur.

Thanks, sounds good. I would like to make up some sandwiches as well. Any ideas for veggie fillings?