You can learn about how to use App inventor here.  If you have any old android phone, you can connect it to the computer and run the game or app that you create on that phone. The following is a full playlist of tutorials if you want to learn how to create android apps.  This is not a part of the course we are doing, but all of the concepts will arise during our course.

Here you can view tons of video tutorials on how to learn app inventor.  It is drag and drop coding, making it much easier to create an app or game than using traditional code such as Java or C#.