These programs were distributed on double-sided disks. Since the disks were double-sided, they were not written to work on a two-disk-drive system. You will sometimes see a prompt that says "Turn your disk over". When that happens, just "load" the other disk in the set.
Use the "side 2" disk to start each of the games. The Adventures Around the World all "booted" from side two to load the game essentials, then ran most of the program accessing the data on side one.