The environmental education program was launched in 2000. It was then a pioneering initiative and Osmose had to start from scratch: to build knowledge and activities, to create didactical tools in Khmer, to train local educators. Keo Yada, a primary teacher, was the driving force behind the program and became the first employee of Osmose. The classes grew quickly, both for school and out-of-school children, namely thanks to support from the Air France Foundation. In 2006, the coordination of the program is taken over by Polyvine (photo), whose focus is to strengthen the capacities and pedagogical skills of the educators' team.

Groups of children are collected by boat and brought to the Osmose platform or to outdoor activity sites (forest for birdwatching or plant study, village for waste collection). Over 1000 children in the four villages around Prek Toal are learning to appreciate and preserve their rich natural environment. In 2007, an independant evaluation of the program was conducted and the results are encouraging: children following Osmose's program have better knowledge and attitude towards the environment. Main sponsors of the program in 2007 are "Fondation Nicolas Hulot" and "Fondation Environnement Veolia" as well as the UK embassy in Cambodia.