They came on my birthday. It was indeed a very nice birthday gift. Since then they had been growing stronger day by day.
When they arrived, they were only about the size of my palm.
Today they had grown twice the size, all in all only about one and a half month.
Initially, I was not sure whether urban beekeeping can be achievable but after these experiment, I am pretty sure urban beekeeping can be done in Singapore. In fact I have already started harvesting small volume of honey from this colony.
Having said that, there are still a lot of preparation work and education needed in order for one to embark on urban beekeeping safely and productively.