Situated in the center of the city, considered as one of the oldest park in Karachi, where you can spent your time in different ways.  

Having some restaurant with variety of foods, also have play area (called Fun Land) for children with different rides for all age groups.  

You can play some outdoor games there as it has plenty of space, such as cricket, football etc., but be aware of people that came to learn driving.  

Hilltop, where you can get the birds-eye view of the city. This place was considered as the highest point of the city few years back, but with the development multi-story building everywhere, not anymore.  

Have Golf-Club and swimming pool, didn’t get the chance to check golf club so can’t comment on that, but the environment of swimming pool is quite dirty. I mean, dirtiest swimming pool of Karachi (or might be I checked that pool on a wrong day i.e. Saturday, one of the busiest day for pools – along with Sundays). But it was fun though anyway, taste cholrine along with swimming is a bit challenging.  

Or you can bring some food with your family and enjoy your meal in open air.