Take a Dip with Some Man Eaters at the Two Oceans Aquarium
If you're ever in the beautiful Cape, check out the Two Oceans Aquarium located at the V&A Waterfront. There are loads of activities for the kids and tons of very useful info for all ages.
Once of the highlights for me is the Predator Tank, which has some really mean-looking fish in there. Take the opportunity here to swim with the sharks. There's even a live webcam, so you can tell all your friends to watch you swim with these monstrous hunters from the deep.
Don't worry though, they won't eat you... or at least I'm pretty sure they won't.