Without going to my old NWT to check, I suspect the two stories about the swine differ a bit.
Pigs were unclean - non-kosher - and probably wouldn't have been owned by a Jew.
Jesus destroyed another person's property as a "demon"stration of his mad skilz as a wizard.
If your kids are gently introduced to some of the MANY inconsistencies of "God's Word," they may be less willing to give their lives and their fates to an organization that sings "these words faithful are and true" (or however that old theocratic song went).
I think BlackSheep is giving you a "black ops" or stealth method of getting you kids to experience a bit of cognitive dissonance of their own, which will result in them saying, "hey, wait a minute..." even if they don't say it out loud.
Apparently, for example, the Israelites did not know the value of pi - one of the most universal ratios found in the physical world.
You might even pursue "the secret of the swine" through the Watchtower CDROM to see what illumination it provides on this subject.
Also, on FREEMINDS you can find Ten Essays on Christianity by Tony Wills as a free download here: http://www.freeminds.org/category/2-short-articles.html