Seems like this entire thread revolved around kosher food and shuls in SIN, but does anyone have any experience with doing anything nature oriented outside of SIN, or crossing into Malaysia?
Is 6/7 days with kids going to be boring?
If you have the budget, there are TONS of child friendly attractions in Singapore. I have taken a ferry from singapore to Batam, Indonesia in the past (just for the cheaper hotels) I have also crossed over to Johor Bahru, Malaysia (which is not a very nice city but Legoland is right around there somewhere, also IIRC there is a hello kitty theme park somewhere there)
There are many day/week pass options in SIN that will give you entrance to the Zoo, Night Safari, Dolphinarium (yes, they have pink dolphins there - kids would love it), Cable Car, etc....
You can do at least 2 days of stuff with the kids in SIN another 2 in Malaysia at least.