A:Answer The green is a soft, removable bumper/pad. The main unit is basically just a regular Samsung tablet with an Android OS preloaded with with some kids apps. We've had it for a few weeks now and it has been great. Just need to find the right apps (using Play Store, just like on a smartphone) to keep the 18 month olds interest! I would recommend an app like Kids Place (by kiddoware) to run while the little one is on it, instead of the Samsung Kids app (which is only a free trial before having to pay).