For $6 (adults), you can not only enjoy the air conditioned environment of the Singapore Science Center, but you can learn quite a bit of interesting information about science and math and everything else that's cool. And, the best part is, you can actually have a lot of fun doing so.
If you're a tourist and only in Singapore for a few days, I would say there are a lot of other cool things to do (unless you are 1) a huge science fan or 2) don't live anywhere near another hands-on science center). But, if you have more than a week or if you live here, I think you couldn't find a better way to spend a hot afternoon.
The whole center is hands-on, but there is a huge section devoted to little hands. Even Caleb found plenty to do and was enthralled with all the buttons, bells and lights. I had planned for us to stay two hours, but we ended up staying four. . . and we still didn't see half of what there was to see! We will definitely be going back.
Maybe we will see you there.