The stock market has been flat for over 10 years, meaning that unless you are very skilled you are very likely not going to benefit from investing in stocks, mutual funds, etc.

The S&P is up 61% over the last 10 years and the Dow Jones is up 60%
Its only really flat or negative for money invested during the 2007-2008 time frame. That money would be down about 4 to 7%. That would be more than offset by money invested in late 2008 to mid 2009 which would have returned between ~48 and 103(!)%
So - if you were to invest $10,000 at the peak in July of 2007 you lost 6.5% so you'd now have $9350. If you were to take another $10,000 and invest it sometime between October 27, 2008 and July 31, 2009 you'd have gained
at least 48% return on your money which is now $14,800
So your $20,000 investment returned an additional $4150 over 5 years. Keep in mind that that was investing at the worst possible time. I didn't even cherry pick the lowest point either - that 48% was from the highest stock market point during that 9 month period.
If you picked the highest point in over a 24 month period starting in October of 2009 you'd still be up 6% total. Not bad considering you chose the worst time to invest in 2007 and the worst time to invest 2009 through almost 2011
WTF? I don't give a shit about Andrew and his bicycle. And why am I solving a problem for someone else? I want the newest XBOX360 and I want to be able to buy it. How do I get there with the money I have? Credit cards? Savings accounts? CDs? Checking accounts? What?
Relating it to the kids is an important part of teaching but does seem to be getting lost. IMO its from a breakdown in our education system stemming from low parent responsibility/involvement, the teaching to the test mentality from NCLB and teacher performance reviews, teacher burn out, and an over concern from administrators about PCness and coddling the parents who vote for them