So regarding Sentosa Island:
Does the island have an entrance fee in and of itself, or do you just pay for what you want to do?
Besides for the theme parks, aquarium and casino (no interest), what are some of the more popular things to see there? I was looking at the luge (as mentioned in Dan's TR), looking around Siloso Point and the boardwalk to walk around. How long will that realistically take? Is it enough to fill an entire day with?