"Originally published in German by Ravaensburger Buchverlag Otto Maier Gmblt under the titles: Spiel, das Wissen schafft; Der Natur auf der Spur; Geheimnisse des Alltags"--T.p. verso.

Includes index.

astronomy;
chemistry;
electricity;
static electricity;
magnetism;
air;
heat;
evaporation and vaporization;
cold and ice;
liquids;
buoyancy;
gravity;
interplay of forces;
inertia;
sound;
light;
illusions;
botany;
birds;
reptiles and amphibians;
fish;
invertebrates;
miscellaneous nature
astronomy;
chemistry;
electricity;
static electricity;
magnetism;
air;
heat;
evaporation and vaporization;
cold and ice;
liquids;
buoyancy;
gravity;
interplay of forces;
inertia;
sound;
light;
illusions;
botany;
birds;
reptiles and amphibians;
fish;
invertebrates;
miscellaneous nature