Our family watched Paul Simon's 1987 Graceland concert from Zimbabwe when the children were still very young. The concert could not take place in South Africa because apartheid laws were still in effect. At the time, our children did not understand what apartheid was. David and I tried to explain it to them. They still did not understand. We left it at that, because that's how it should be. We wanted them to see how unreasonable it was. How wrong it was. How do you explain the forcible and legal segregation of peoples based on race, ethnicity or religion?