You might consider collaborating with local community colleges on this venture. Those that have a culinary arts department might welcome a hosted workshop with the given kits where future chefs cook a meal and forge a new bond with an older member of society. The college student might learn a new technique or skill that will benefit them later in their career.
I think this is a great idea, and having recently graduated, I would be very interested in a program such as this. You're definitely filling a need in this exchange of information. How would you plan to raise awareness of this site so that both the just graduated and just retired know about it?