I am planning to fly to SG during holiday in April. Beside of Universal, is there any activity place that suit for 3 years old girl?

Besides places people have suggested above, you can also take her to informative places like:- 1.Singapore Science Center 2. If your child is curious about animals, you can take her to Farmart Center http://sg.kidlander.com/location/farmart-centre/ 3.Changi Museum to inform her about WW2 http://sg.kidlander.com/location/changi-chapel-museum/ Enjoy your trip!