Oh...this one not very sure leh....but i heard the taxi-driver
and hotel staff say can go to Langkawi like what you say
lor....
like go there in the morning, then maybe by noon or 1-2pm reached
there, then can do some scuba diving or play sand etc, then evening
have some nice seafood, satay, etc, then night time go around
island for adventuring or see if got any shopping or nightlife
etc...
next day noon can come back Penang where maybe can then take night
flight back to sg lor.... 
