Ravensburger Simple Science Experiments Author:Hans Jurgen Press This is the perfect book for the young person who wants to know how things work, and why they work: more than 200 simple experiments that are not only entertaining, but educational... Children of all ages -- and their parents too -- will find that this book both stimulates and satisfies their curiosity. — This book was originally published in Ger... more »many in 1964 under the title "Spiel--das Wissen schafft" and has been republished by Discovery Toys.« less