If I were really rich, I'd pay for them to be sent to space to see what their reaction would be. If they still don't believe the earth is round, they can stay there. Put some cameras on it, could be a new TV format.
It could be on the back of 4 elephants which are in turn on the back of a turtle. Get them back to earth and invite them on to loads of talk shows to tell everyone what they saw.
If I were really rich, I'd pay for them to be sent to space to see what their reaction would be. If they still don't believe the earth is round, they can stay there. Put some cameras on it, could be a new TV format.