After visiting Marine Barrage with our daughter and seeing all the kites, we decided to buy one for our next trip there. I found Kite Culture online and they have a large assortment. I opted for a fairly simple monarch butterfly designed kite which was cheap at $18.
Kite Culture allows you to pick up (Choa Chu Kang) or delivery (cost $8 and takes 4-7 days). I ordered the kite on Tuesday and it was delivered over the weekend. 4-7 days for domestic delivery is a bit long. I thought the delivery cost was quite high relative to the cost of the kite, but still better than pick up because of my schedule.