Years ago, I had taken belly dancing class just for the fun of it. It involves isolating the lower, middle and upper part of the body. If we move the hands, then we keep the lower part still. Belly dancing is a good workout that helps build the core muscles.
The instructor and some of the regulars would have the custome- the belly dancing belt or a scarf like with coins attached to it- so as they move the belly, the coins would make a sound like the diagram below:
In case you are wondering where to buy it in Kuala Lumpur or Selangor- you can buy it from Berjaya Times Square- at one of the shops (but sorry, I’ve forgotten which one).