What freido said, I’ve been using Sharebuilder and have been very happy with it. $6.95 per trade so keep in mind, that seven bucks is more then 10% of one share of Target.
I don’t know how much you’re willing to give her, but maybe buy her say, 5 shares of Mcdonalds, let her pick a time to sell it and then let her trade it until she’s out of money. Tell her (and I think this would be fun), if it hit’s zero (or close to it), she’s done, it she doubles her money she can withdraw it and keep it (or maybe withdraw half and you can take the other half back).
Something like that would be more fun, IMO, then just having a stock certificate, but actually force her to start learning how to interact with the market. Hell, you might catch her watching some CNBC at night after she’s done with her homework if she thought there’s a $1000 reward in a few months.
I started trading a few years ago, I only wish I had learned a few years earlier. I’m kicking myself for not getting in during the 2009 crash. Learning how to trade at 16 is going to be a lot more valuable then framing a piece of paper that says 1 Share of TGT.