feifei, i didn't know till I saw the pics of a nephew when he turned 4mths. There are still a few customs to get through.
When baby reaches 1yr old, they have to step on ang ku kuen (each leg on one), then also give them a range of stuff for them to pick to show wat will they be good in (etc, money, calculator, ruler, food). Anyway, these I usually leave to the elders to arrange. If they never arrange, its also ok for us, coz we not so pandang.