Childrens Application

I would like someone to build me an application, initially for the iphone, but if it is successful then also an android. The specification is to build a child application whereby an icon is pressed on the main screen and this then switches to another screen showing only a few icons, the background remains the same. These few icons would be selected by the user in some sort of settings menu within the application which can also be from the users previously downloaded application. To go back to the normal home page a certain button would need to be clicked. Also if you can give me an idea of what we could do for the home screen button so it does notg automatiucally go back to the hone screen that would be great.