We recently tried Cafe Melba at Goodman Art Centre and were really pleased. It has great coffee, healthy food and juices, has lots of shade, and is a very family friendly setting - including lots of family activities all round the complex. Definitely worth checking out! For weekend brunch, There's also Potato Head Folk rooftop on Keong Saik, which is also family friendly, chilled, and has great brunch options. Enjoy!
I would recommend botanical gardens