Every Apple Store has a dedicated sections for kids with iMacs that have got Apps (including games) loaded on them specifically for kids. This has been a very popular section and has helped Apple to sell more iMacs.
Now, it appears that as we slowly enter into the post-PC era, Apple has replaced the iMacs with iPads with all the special Apps pre-loaded on them for kids to play and have a good time. And in-turn sell more iPads. The iPad is definitely a more intuitive device than the iMac for kids, and this seems to be a good replacement.
Apple has been replacing a lot of things lately in the Apple Stores with iPads including the paper product specifications card with iPads.