I just starting to teach my kids about money and I started with opening up savings accounts for them through a website my friend showed me:
www.earlyearners.com
I like this site because I can go through some of the calculators they have that shows how much my kids can accumulate by buying one less DVD or shirt each month. There is also a chart that tells me by age how I should be teaching my kids about finances. I like the fact that my kids will learn about saving and budgeting while actually doing it in real-life. My parents opened a savings account for me when I was 7 and I had to put half my gift money and then part-time job income in there. By the time I entered college, I have a pretty nice amount of money!