Hi everyone,

I'm planning a 4D/3N trip to Singapore come March. We are planning to go to the following places.

USS
Singapore Zoo
MBS Skygarden
RWS and S.E.A Aquarium
Duck & Hippo Tour
Singapore Flyer

I got a couple of questions.

Which would be the best order in which to visit these places to maximize time usage? From what I heard, visiting some places may require a full day. Feel free to add or suggest anything. 

Day 1 - Singapore Flyer, Duck & Hippo Tour, MBS Skygarden (afternoon)
Day 2 - Singapore Zoo (morning), RWS & S.E.A Aquarium (afternoon)
Day 3 - USS (full day)
Day 4 - ??

Thanks in advance.