Do your children a favor and get them a "real" computer with keyboard and mouse, instead of a tablet. I've found it helps with several things. For one, I've seen children accustomed to using touch interfaces blurring the line between physical and virtual, i.e swiping at physical objects like books, photos, even walls. I've not seen this behavior with those used to non touch interfaces. Also, learning to use a keyboar…
Even more important is the nature of PCs vs mobile devices. The mobile platform is designed to commoditize the user and create a stark division between users on one side and content and software creators on the other. You can't easily create anything of any substance on a mobile device and the ecosystem discourages it by e.g. treating user data as unimportant. PCs were designed to be devices for people to create thin…
They’re currently not good at programming, which is a small subset of content creation. This problem plagued personal computers for a long while as well. For example, Apple’s Lisa could only be programmed by attaching it to a second Lisa (which was extremely expensive). Being able to program your computer with itself wasn’t always common.
These are early days still. Tablets will get there some day. It’s a techical problem, and technical problems have techical solutions. Give it time.