Solomon Islands cultural question

I'm off for the Solomon Islands soon. I have a cultural question for folks
who have been there. The books all say that if you visit the villages, which
we will, people will give you presents and that you should be prepared to
reciprocate. But they don't give any clues about what might be appropriate.
When our dive group went to Fiji, the boat captain suggested school supplies
for the children, which were joyously received but dreadfully heavy objects
to cart around in bulk.

Does anyone who's been there have any suggestions?

Thanks in advance,
Becky in Austin