hi

,
you can think of ,concentrated perfumes (attar),if u go to any perfume shop u will get some good ones which will be beautifully packed to give as a gift, Ouud (ask the shopkeeper to give the best selling product) and its burner or a beautiful potrait.For his wife some good,stylish indian kurti (arab women love indian dresses as most of them r crazy of indian-hindi movies,but make sure its not too glittery),n for kids u can take box of chocolates(maybe galaxy,twix,mars,snickers) or arab sweets named bakhlawa.
Hope this helps u....or lets see wat other Ilites hav to say about it
Bye