For mums who are considering moving to Kuala Lumpur, I would highly recommend you join the Ibu Family Resource Group in KL. Ibu means mother in Malay. This is a support group for mums (and dads are welcome too!). What you'll find is a network of expat and local mums, playgroups you can join, Parents' Night Out events and many more.
I am not a member but I have joined their group on Facebook. Everyone has been really helpful on FB. You can ask anything you like e.g. where to find a good paediatrician for your children, recommendations on schools, help with asthma/sleep problems, where to buy furniture, maids recommendation... friendly mums will chip in with useful info. There is also a separate group linked to it where you can sell/buy used baby/kids' stuff.
I remember being a new mum all alone in Jakarta and if not for the help of my friendly neighbour, I would have been lost. When we moved back to KL, Connor was 14 months old and I was bored to tears sitting at home alone with him. I found out about ibu and attended various playgroups organised by ibu and had a lot of fun meeting other people.
Do check them out if you are thinking of a move to Kuala Lumpur.