Q: can i remove all of the games from a mac book air but not lose the content. Or have them only available on an ipod or ipad

Can I remove or transfer all of the games from a mac book air and an iPhone 4s but not lose the content. Can I have them only available on an ipod or iPad. The Problem: My son plays games on those devices. I don't want to permanently remove all the work he has done in Minecraft and others. I have to limit the games somehow!!!!