I can't recommend a site for adults seeing as I live in a beach community/tourist area w/ tons of shops w/tropical wear. Wait a minute--you may be able to see if Tommy Bahama has a web site. Gorgeous tropical/casual wear. Very pricey for casual stuff but lasts!! If you have a relative in the military some BX's carry the brand for less--my parents got my husband his shirt for tropical night for $69 as opposed to their suggested retail price of $98. They double as beautiful golf shirts, too. Anyway for kids I like gymboree.com and I just bought my daughter a couple tropical outfits from their new line---Hula Girl. The dress had matching sandals you could purchase!! The hula girl line also has hawaiian shirts for little boys too, I believe. Good luck and hope this helps a little.