This study aims to examine the impact on environmental attitudes and awareness of kindergarten pupils of an intensive education programme based on basic science process skills including the ‘reduce, reuse and recycle (3Rs)’ paradigm for preschool children. A quasi-experimental pattern with non-equivalent pretest-posttest and with a control group was used. The study was carried out with kindergarten pupils a district located in the Aegean region. The study was conducted with a total of 38 children in four classes, two of them in the experimental group and the remaining two in the control group due to the pandemic conditions. The "Environmental Awareness and Attitude Scale for Preschool Children" was utilised in the study. According to the results obtained in the study, there is a significant difference between the mean scores of the pretest and posttest of the experimental group. In addition, it was found that the mean of posttest scores of the experimental group was significantly higher than the mean of posttest scores of the control group.