In Cambodia we met the tuk-tuk driver Seng Chanty. Seng wanted to build a school in his village to provide free English lessons for children. However, his social project lacked the necessary financial resources. Together we developed the idea of renting out the empty rooms of his house to travelers and enabling them participate in the daily life of the village. Within three months, so many travelers visited Seng that he was able to build the school and hire an English teacher from the income.