Most nights a week there's a show on called Crane Dance. The show is about two massive steel birds that meet, fall in love, and through their love end up becoming real birds and fly away.
It's a fun thing to see if you're already on Sentosa, but not worth making the trip just to see this.
The show is something like I've never seen before. It's all mechanical, but done in a way you'd think a puppeteer was controlling it.