Looks like the FreeTime Kid Proof case will be sold on Nov. 15. If I were a parent, I'd wait and buy the 16GB and a case separate.
http://tinyurl.com/qjsb3t6
I have a friend that has one of these for her daughter, they love the case. Maybe they'll make an HD 6 version.
i-Blason ArmorBox Kiddo
http://amzn.com/B00FGAH7PU
I can't see how an 8GB tablet would work for any child that has full access to the tablet. Maybe they're hoping to sell them to schools that limit usage.