Securing a young child's tablet My wife has decided to get the kids a set of android tablets for christmas.  These are Coby Kyros 4GB wi-fi only models.  The kids are ages 6-10 so I don’t particularly want to let them have free reign of the internet or the app stores.  I also want to make sure the tablets are protected from the various forms of malware.  

Ideally I would like to be able to establish a white list for the websites they are allowed to visit, and make it so that they are not able to add any apps or modify the white list without parental intervention.  However I am not familiar enough with the android platform to know where to start on any of this. 

Google has helped me find out that apps exist which claim to be able to restrict access to other apps, but almost all of them have comments indicating that they are very easy to bypass.  Likewise I have been seeing mixed reviews as to the effectiveness and value of the antivirus options that are out there.  So far I have not been able to find anything about building a whitelist, or restricting content accessible from the web.  

So I am asking for suggestions as to specific topics/apps that I should be reading up on, and/or other approaches that I can take to reach these goals.

EDIT:
I should note that this model does not come with the android market pre installed, it has some third party app store on it.  It does come with an apk manager installed, and I have played with one of them enough to get the market and gmail onto it.  So I should be able to get most anything installed/removed if I can figgure out what it is I actually need to do.
The overall outlook is not so great for you, AFAIK.

The Market has content filtering, check the Settings in the Market app.

For the browser, that's a wholly different kettle of fish.  The built-in browser doesn't have any kind of filtering available.  3rd party browsers might, but they'll be trivial to sidestep (by simply opening the built-in browser).

The next best thing you can do is filter the tablets at the router, if it allows for that.  However, that's only useful when they're at home (or other places where you can control their internet connection).