2.1. Study Sample and Setting
The “Nutritional Adventures” program was implemented during the school years 2020–2021 and 2021–2022 at primary schools in Greece. A random selection of schools was performed using the national list that the Greek Ministry of Education provided. Only primary schools were considered eligible for this program, since its educational content was tailor-made for this grade. Due to the online character of the educational activities, no geographical constraints were set. In-class Internet access and laptop or desktop computers were the minimum technological prerequisites needed. Once a school was randomly selected, an information letter with the program scope, content, and specific activities was delivered. The administration body of the school, led by the principal, was responsible for accepting or rejecting the invitation to participate in the program. In case of a lack of approval, another school was randomly selected, and the same process was followed. During the 2020–2021 and 2021–2022 school years, the program reached 