rebecca,
yes my pd say he is a bit slow, but still within the ok range...got to monitor till he is one year old.
jjmom2008,
he juz shift here and there, flip but dun really crawl leh.
yes i do let him sit with my support or on the bumbo or walker...maybe 15mins every times and ard 4 times everyday. Is this sufficient? what else can i do to encourage him to crawl or sit independently?