Try wild wild wet and escape theme park.. they are both at downtown east (pasir ris).. and they are next to each other...
http://www.mytourpal.com/hotelListing/Singapore/Singapore/ about 8 years ago
give sentosa songs of the sea a go: pretty amazing light / water show: about $20. also night safari is different. AND for something completely in singapore go and visit Poison Ivy (ivy singh) at Bollywood Veggkes out in Krenji..amazkng entrepreneur, great food and total enviro farm. Tell Ivy that Paul from Sydney sent you! about 8 years ago