Actually Mark you don't have to get that elaborate. Simply remove the icons that you don't want them to access. Simply creat a new program group box of icons with programs you want them to access. I'm betting Win 3.1 is booting into the Main Window.
Go to File from the Program Manager Menu Bar and click on New. You will see New Program Group and Program Item options. From there you can pick and chose the programs you want them to use and add them to the new program group.