Although such as educational uses may be stated as being one of the primary aims when parents buy their children a tablet, it will not be the only use. Games are likely to come into it at some point as well.
The All-New Fire 7 Kids Edition can play games. These can be purchased from the Amazon Appstore (rather than Google Play) and enabled for children to use in the parental controls.
As well as purchased content, their are games included in the Amazon FreeTime Unlimited package, and other content too. These games are filtered so that a child will only have access to age-appropriate content.
Games do not only have to be for fun; many games have educational uses as well, allowing parents to get their children to learn whilst playing a game.