My son is now two-year old and we are moving into a new house. We are now considering whether to buy a 兩尺半床 or 三尺床 to my son. We expect we will buy another new bed to him when he is 10-year old. Of course we know a 兩尺半床 is more comfortable than a 三尺床 . But as his room is not large, we need to balance between the size of his bed and his playing area at room. Please kindly advise, many thanks!