About ecology - to preschool children of all ages. Open lessons in the younger, middle and senior groups of the kindergarten “Solnyshko” of Kaleikino railway station settlement was held together with specialists from the South-Eastern Territorial Administration of the Ministry of Ecology and Natural Resources of the Republic of Tatarstan. The youngest groups played the fairy tale “Teremok”; those who were older learned the world around them through experiments. They dissolved substances in water, observed the process of mixing paints and allocation.