My DS is only 16 months, so I'm still waiting for the day when coins are no longer a choking hazard.
Then he'll get his first piggy bank.
When he's a teenager, I plan to get him started with a mutual fund. (See my post about how my father did that for me and how it turned out:
Consider starting your teenager off with a Mutual Fund)
I'm curious to hear of any other creative ways that people are using to teach their kids about money.