I think Joan has the right idea... it's not really what you do, but the fact that you're together, just hanging out. Rain and I end up talking a lot in the car, and while walking the dogs, and sometimes we're both folding laundry or something. Oh, and she gives me pedicures sometimes, she had a fancy kit. Sometimes we go for coffee, or go bvowling at the student union (very cheap, plus since we're with lots of college students it's cool). It's all really low-key, though...
I was doing errands today, and because it's spring break here a lot of parents were out with their kids. The happiest-looking groups were talking together about what was going on, or about movies, or about the kid's soccer team. Also, the kids were often involved it whatever the task was. I saw a 2 yr old slowly pushing a shopping cart, a 10ish yr old bringing over a bunch of banas and asking if those looked ripe enough, and a little boy (maybe 6) running down the aisle shouting, "I see the bread! I got the bread!"
Then there were families where the parents only talked to the kids to tell them what to do: "Get out of the lady's way" or "Go sit on that chair there and wait." It didn't feel like the family was off doing something together; it felt like the parent was shopping and the kid was not a part of it at all, like he shouldn't have been there but since he was, he should just be quiet and stay out of the way.
I know this is sort of off the subject, but it seems like the easiest way to keep communication open with preteens and teens is to *do* something together, and maybe doing this with younger kids is the easiest way to get this pattern going, and keep it going...
Dar