The HD 7 (internally the same machine) is on sale today only for $79 for the 8 GB or $99 for the 16 GB (configure the size in the checkout page). That is a very good price, but it is still a weak machine. If you are considering I would recommend the 16 GB.
Note: after several months, I really cannot recommend this tablet. It crashes almost daily. The storage amount is so small it is almost unusable because I can only keep about 6 to 8 apps loaded at a time. And it is frustrating that Amazon blocks the standard Google App store (I know you can get around it, but I should not need to do that). So good apps like the Kids YouTube app are not accessible. If I had it to do over again, I would buy an iPad mini, even an older refurbished version would be better than this. If I only used it for Scribd or video streaming, which still works fine, I would probably be happy.
However, if I had the option to return for a full refund at this point, I would.
Summary: If your expectations are not an iPad, this is an acceptable tablet, especially when you find it on sale.
A couple weeks ago when the Amazon Fire HD 6 (Kids Edition) was on sale for $119 I picked one up.
I had a couple of use cases that I was interested in. Primarily, I wanted to use it for myself with Scribd (review) for audio and ebooks. But I also was interested in the Kids Edition because I have a one year old. (And frequently visiting nieces that are 6 and 7).
After almost 2 week’s use, I am mixed on the Tablet as a whole, but less negative about it than I was initially.
I really like the size. It is roughly the size of my Kindle Paperwhite, and fairly light. My 13 month old daughter has no problem at all carrying it around. The case that comes with the Kids Edition seems like it is a bit cheap but it really is really protective. It is made of foam and stands up to the one year old frequently throwing it on the floor. And because the Kids Edition includes 2 years of accidental damage warranty, I really don’t have to worry about it. The cases only come in Green, Pink or Blue, the Fire HD 6 Kids Edition itself only comes in Black (the standard HD 6 comes in Black, White, Pink, Blue and Green). The one negative of the cover is that it can get a little warm if used for a long time.