Depending on the countries visited, some small gifts to distribute to local populations may be appreciated. In general, we prefer to advise you to approach reliable local associations which do an excellent job on the spot.
If you wish to buy gifts, we advise you to consider creative materials (notebooks, coloring books, pens, colored pencils, markers, stickers, etc) for children.
To make a lasting impact, we also recommend getting in touch with reputable local charities that are doing fantastic work on the ground.
Polaroid photos are also a wonderful way to connect with local people!