Does plastic sink, and how passes the dissolution of substances in water? The pupils of the kindergarten “Solnyshko” of Almetyevskiy district sought answers to these and other questions. The event was held with participation of specialists from the South-Eastern Territorial Administration of the Ministry of Ecology and Natural Resources of the Republic of Tatarstan, and the lesson “Our Experiments” was held for children. Having witnessed a series of experiments, the children got acquainted with the properties of water, examined stones, determined the characteristics of wood, metal, plastic and fabric.