Halina Bobrovnik attended a lesson in 1-B grade. From her words:
'Water is one of the main resources of the Earth. It plays an important role in human life.
But first-graders are just learning to distinguish between living and non-living nature, establish relationships, explore objects of nature using available equipment, and draw their own conclusions. This is exactly the lesson that primary school teachers in 1B grade attended on the topic "Properties of Water. Experiments." Under the guidance of their teacher Kravchuk M. P., students learned to deepen their understanding of the value of water for life on the planet, conducted experiments that helped children make sure that water has no color, smell and taste, water is fluid and takes the shape of the dishes it falls into, water dissolves some substances, can dissolve paints.
And at the end of the lesson, a fairy sorceress who knows how to show magic tricks visited the first graders! This is a chemistry and biology teacher - Khandozhko L. V.  She threw a piece of active metal into the water, which reacted violently, as a result of which the solution turned pink and gas was released.
Then the biologist created a "volcano" with a magical movement of a glass wand!  She poured the magic powder onto a large metal plate, giving it the shape of a hill, poured alcohol into the hole and set it on fire.
From the "crater" a sheaf of bright sparks and dirty green "volcanic ash" scattered in all directions and the water evaporated!
And the boys of the 1st grade immediately wanted to move on to the senior classes as soon as possible, so that they could also learn magic'