What are the biggest differences between what the rich and poor spend money on? (And what can that teach us?)

[youtube http://www.youtube.com/watch?v=VnVJAkhGyjQ&w=600&h=315]

I saw this article the other day and I was interested; here's why. I grew up in the 10128 zip code -- one of America's richest -- then ended up teaching elementary school in 77013 -- one of America's poorest. When I went on play-dates as a kid, other families often had huge TVs and entertai…