In this book, we aim to spark children's interest in the algae that inhabit both freshwater and seawater, highlighting their importance for the survival of all living beings. The vocabulary was carefully chosen to maintain the child's interest during individual reading, as well as when reading with family or at school. The playful tone allows for the introduction of concepts in an accessible and engaging way, encouraging a love for reading and learning from an early age, and reinforcing the educational nature of the book.