Suggestions for 'Gifts' to Have on Hand While in Area?

This trip in particularl I'm travelling very light (hiking in back country). Decades ago when I traveled a bit in S. America I found it meaningful to have a small gift that could be offered to say a host or someone you spent time with or something or added value or helped in your travels. I've been gone for so long and feel a bit disconnected... I don't know what items might be meaningful or add value to peoples lives. Any suggestions should be very small and lightweight however.

Appreciate any suggestions