if u have lots of female in ur family then take some makeup kits like nail polish, lipsticks etc..VS will have a good ones and on good price as well...
if u have lots of young guys..u can take something like t-shirt...from  abercrombie,AE or aeropostale,
if u have lots of old male like uncle haru then take some scarfs as electronic goods might be expensive..
for kids u can take chocolates(but that will be very heavy)...take something from disney store or wal-mart..

go to macys..u will get what u want and sometimes for a good rate...