Hello, I'd love advice from anyone who has found a great family friendly hotel in central Singapore. Our kids are 2 and 4 years, so I'd love interconnecting rooms or a separate bedroom to have a bit of space away from sleeping children!
Many thanks.

I realize it's boring, but I stay in the Marriott in Singapore and it meets all your criteria. It's centrally located, has a great pool, connecting rooms and multiple restaurants that are kid friendly.
I've found Marriott's, which normally cater to business travellers, to be pretty kid friendly.
Good luck.
What is your budget? Fairmont Singapore is amazing for families and probably the best hotel in Singapore. We loved our stay there and just wrote about it:
http://www.soultravelers3.com/2011/03/top-hotel-for-luxury-fairmont-singapore.html

swissotel stamford has a great location.
regent up the top of orchard has great service.