There is nothing better than a family road trip. Load up the family on a Sunday afternoon, or if you are really fortunate, a longer road trip to your favorite vacation spot. Both are great, I like the Sunday afternoon drive, on a nice warm, sun shiny day. Great weather and a scenic route all picked out.
You will probably meet some resistance from the teens in your family, but I can just about guarantee that when they grow up, they will still be talking about that ice cream stand you found out in the middle of nowhere, on one of those corny "family" outings. They might even admit in public, that those trips are their favorite memories. That is worth it's weight in gold. It is what live is all about, sharing good times together.