What if everyone got to put in one question, then everyone has to answer it? Maybe everyone put in a question on Day 1 and then we draw out a few each day for everyone to answer? I think it'd be fun just to see what questions the kids come up with.
Family Tree Quilt in the Works - come with paint, let everyone contribute. Maybe names next to hand prints (use a Sharpie)? Capture your memories then upload them to to store them safe and privately forever.