Stripped down cell phones for teens

Just read NYTimes article on sexting. Makes me wonder. Are there stripped down phones for teenagers that don't offer texting as a feature? Could one lock them down so the functionality couldn't be added? Given all the driving related issues with teen texting, seems like a natural, though there are unintended consequences of making them talk while driving. Maybe just target for pre-driving teens?


... just learned on Fbook that providers offer this.  Good to know.  Why didn't these parents do that?  I guess the fact is that texting is just one avenue.  If they can't text things, they'll email attachments or something. This is more a cultural/parenting issue than a tech one.