This paper explores, along with the importance of water for the life of all living beings, the methods of transferring and expanding preschool children’s knowledge about the importance of water. Despite the fact that all living organisms differ from each other, what they have in common is their need for water. Water is a fundamental condition for their survival – it is formed by joining two hydrogen atoms with an oxygen atom, which ultimately results in a water molecule. This bond between hydrogen and oxygen is crucial since it produces important variations in their arrangement. The origins of life can be traced back to a drop of water, which emphasises the significance of this natural resource. The first civilisations emerged near great rivers; this further indicates that water has indeed played a huge role in the history of mankind. Water makes life possible – it is a key element on Earth; it covers the vast majority of the Earth’s surface, thus naming it the Blue Planet. The areas that are going to be explored in this paper are: the properties of water, its distribution and importance for living organisms, as well as the kindergarten activities involving water. One of the important goals of sustainable development is to teach children how the lack of water affects people’s lives and the environment. By learning about solutions to water scarcity problems, children will be able to understand the importance of conserving water resources, and to take measures to protect them. Teaching children about the importance of water can help them understand the importance of water and the need to conserve it.