Plungė kindergarten “Vyturėlis” (Lithuania) organized competition of educational institutions “STEAM laboratory 2023 – Water”. Methodical material – the online experiment book was created. The book contains descriptions of experiments with water. The experiments were tested and described by teachers of Lithuanian preschool education institutions and representatives of the teams of the project’s partner countries. This product is a great helper for educators who organize educational activities with preschool children. This is a rich deposit bank for parents, how to spend interesting time with children experimenting, creating, learning through exploring.