After the sweat of finding all the cache surrounding Putra Square, come and have a rest here.. enjoy the scenery by the lake, plenty of cafes and food court to eat something nice, and if you're with kids, there's several family friendly activities too available.
As for me, I'd like to enjoy the small fountain at the end of the square. The sound of the water flow just allows me to chill-- and while doing that, I'd wanna listen to The Rolling Stones.