I must agree with everyone so far on this thread:
Rather get him a DS Lite. I know he is expecting a PSP, but after the initial shock wears off and he starts playing games like New Super Mario Bros, Animal Crossing Wild World and Mario Kart, he'll love you forever.
The PSP just doesn't have the games to compete with the DS Lite. And your kid will probably not be in to homebrew, so there really is no reason to own a PSP. The games and the system is more expensive than the DS Lite.
If your kid wants to watch movies, view photos or listen to music, get him an Ipod in stead. It's miles ahead of the PSP anyway. But if your kid wants to play games, get him a DS Lite.
A warning though: Being a Nintendo owner is South Africa is hard work. You're going to have to buy most of your games online or at special "gaming" shops like Animeworx or BT Games. So far, most of my Nintendo consoles and games were bought from Animeworx. Take2.co.za is also well stocked of Nintendo products and since the DS Lite is region free, they can even import you US or UK versions of the game if the South African supplier doesn't have stock.