My son, aged six, has been loving the iPad game creator Bloxels. It's an amazing, kid-friendly game builder. My son used it to create a side-scrolling version of Minecraft, complete with animated versions of all of the mobs.
I'd also recommend it for adults that are interested in game design but don't want to learn code. Pretty quickly you'll start learning about challenges related to animation, level design, and that eternal question - "where is the fun?"