KidsWWW - Safe Internet Browsing for Kids on iPod Touch, iPhone and iPad
Parental controls work well on iOS devices as far as apps are concerned. We wanted the same level of access control for web sites and so came up with this little app.
It lets you define the list of bookmarks/URLs that you want the kids to be able to access. The list is protected by a "parent code" which you can pick to be any length. Want to change the list? Just type in the "parent code" and edit the list right on the device.