I can't remember where I read this but here's a little statement about life today.
In the U.S., the number of words in the vocabulary of an average 14 year old in 1950 was about 25,000. By 1999, it was down to just 10,000. I can't imagine what it is today with the glut of sound bite media and texting mania.
Do yourselves and your kids a favor and read some old classics. If you don't have time to read, pop on a book on tape while you're driving around.
Right now, we're listening to "Pinocchio" and I'm floored at how much more advance the vocabulary is in this children's story than so much of what I've read lately. If you only know the Disney version, I think you'll enjoy the original. So, go pick a classic to share with your kids (or just enjoy on your own). It's a good thing!