Found this link for the classic Walk-Through Paper Trick while over at Mason-Dixon Knitting. Who says you can only learn knitting things from knitting blogs? Ann & Kay seem to love the web fun bits as much as I do; they are a great source for this sort of thing.
Anyway, I can't wait to show my kids this trick tomorrow so I can blow their little minds!
What do you mean, "Is that good parenting?" Of course it is!