I've been trying to think what we did My kids were 2 & 4 when we went. We swam a lot, and ate out a lot went shopping. We went to the zoo, the Singapore flyer, and we went to a water park (can't remember where that was atm). There was an indoor play centre we went to as well.

The days kinda flew actually just with swimming, sleeping, and eating out. The shopping centers often had things for kids to do too.

I'm sure you'll enjoy whatever you find to do. Sounds like you have a few plans already. We found we needed a day off between activities, cos there was just so much walking in the heat and the kids would crack it. So every other day was spent sleeping and swimming