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A stimulus for children to discover the world of the four elements: earth, water, fire and air. An introduction to the basic principles of science like gravity and the refraction of light. But especially creative pleasure too! This book is particularly well suited for children in the upper grades. Language: English.

Walter Kraul (1926), studied mathematics and physics. Following a scientific career at the Sonnenobservatorium Wendelstein he taught at the Rudolf Steiner School in Munich from 1953. After this, he established a toy firm for which he designed, manufactured and sold the games.