Well, I can't believe it, but we've just returned from a trip with the kids overseas and guess what?  It was fun!  Unbelievably they were wonderful-- wonderful on the plane ride, fabulously behaved while we were there (I mean MOST of the time anyway) and great adventurers.  We spent 4 days in London as a family, then another 5 days with both, yes, both at the same time, sets of grandparents.  An amazing time was had by all.  By the time they were sick of us, they were seeing new faces, and faces that wanted to spoil them rotten.  If you can bear your parents and/or in-laws, I highly suggest this for travel help!