Combining physical and digital for make believe play, our Makego toy app + a Lego case for your device is an ideal combination. However there are a few options out there, so this post aims to help you decide which one is best for you.
Whilst other products shown below aren't officially licensed or endorsed by Lego, they do provide older device compatibility...
BrickCase by SmallWorks is available for iPhone 5/5S, 4/4S and iPod Touch. There are brick mounts on the rear side of the case and on the top edge.
The cases by TinkerBrick are available for iPhone 5/5S, 4/4S and iPod Touch. There are brick mounts on the rear side of the case, none of the side edges but some on the front face of the case.
Want some building ideas? Take a look at this Flickr Group.