Well, suffice it to say that with both sinks full of water and not clearing with a plunger, I was beginning to see the sense of her youthful wisdom. Wait! It gets better.
I gave up trying to plunge the problem away and, having enough sense, little enough as it is, I decided to keep my daughter involved in the problem solving process. We proceeded to remove the U shaped piece of pipe. We had a good laugh as we saw it packed tight and full with ground Pistacchio nuts. I mean packed tight!
I thought we were home free, but water still wouldn't drain down the non-disposal sink. As I sat there thinking about what I could stick UP the down pipe to clear out some stubborn nut shells, my, by now, obviously smarter daughter grabbbed the plunger and said, "Just use the plunger, Dad!" Whoosh! Out came a wad of nut shells.
We put the pipe back together and all was right with our world. The best part of all this was the time spent with my daughter problem solving and doing something more useful than watching TV.
I hope you all realize how much courage it takes to share my ineptitude with you all for the sake of sharing a good home repair story!