Its been an interesting read going through all the posts in this forum....We also have placed a new cache only to have the FTF denude it of all 'valuable' items to be replaced with what we think are of lesser value items.. it is disappointing but it seems to be the nature of the game. We would all love to live in an ideal world but alas not.
We often geocache with our two boys and do encourage them to think about what is an acceptable swap, it can wind up with a bit of a debate.
So what we seem to do now is add lots of little kiddy stuff, kids are like magpies, if it sparkles or seems collectable, it's cool! up-caching is a great idea, and is something we try to do, but if there isnt something we think is worth taking, its a TNSL for us or left "..." SL.
At the end of the day seeing another 'smiley' makes it worth it!
PS: I have seen some truly aweful junk in some really awesome caches, it just comes down to a few rotten apples.....It confounds me sometimes that people can go the extra mile to find a cache but dont put the same effort into the trades... I could go on and on and on... haha but I wont.
Happy caching everyone