I lived with my former wife in the suburbs of Johannesburg for three years.
I love Johanneburg. The weather is second to none. I recommend going to the Johannesburg Zoo where one can enjoy the day and the enterance fee in nominal.
Next store  to the zoo is Zoo lake. One can enjoy a nice dining experience in the restaurant next to the lake. The scenery even in the winter is beautiful. Joannesburg offers some interesting sites. One has to be careful with one's visit to advoid the high crime areas of the city. Casual clothing and no jewerly will advoid most of the problems.  The food in Johannesburg is excellent.. in fact second to none. Withe the favorable rand dollar exchange dining is in expensive. Traveling at night in Johannesburg is dangerous due to the high jacking.  Travel during the day is relatively safe.  The new lost cities gambling casino next to four corners mall is a fun adventure. Visit sandton city mall and enjoy many luxuries. A trip to the lions park beyond the city will be very enjoyable.  The ranberg gardens in randberg will provide great dining and a fun time visiting the local shops. Have a money burger at steers and enjoy the food. Try their ice cream as it takes very diffrent from what we eat in the states. Visit clicks and enjoy the south africa biltong.. their version of beef jerkey.
Most of all go to Nando and enjoy some of their perri peri chicken.  Enjoy a night at the randberg gardens and see the laser show.  Take your family up pretoria and visit the hartesbeesdorph dam. Buy some of the local nuts and fruits and enjoy the day.
Take the tram ride up the hughe cliffs and enjoy the parasailors. Most of all bring your camera with you and plenty of film.  Take some time to enjoy yourself in johannesburg
go during the off seasons.. and visit margate south of durban...... 12 dollars us for a beautiful three bedroom motel with a kitchen
Most of all enjoy.... South Africa is truely a real eden. Despite the crime and poverty
is a beautiful