The Singapore Science Centre was a really good choice. We could have spent hours more there. The photo (where the kids are lying back) is of the Omni Theatre where we watched a documentary about prehistoric sea creatures. It was played onto the whole of the ceiling, which was circular, so the movie showed all around and above you. This made it all the more fascinating and scary... the massive creatures shooting up out of the water at the camera! It was super cool.
The other photos are a few of the 'illusions'. There were tons of other things to see and do.. mostly technology and science, plus a magic show.