Day and night, ebb and flow, forest and desert? our home planet is teeming with wonder. What treasures are hidden in the earth? Why do earthquakes happen? Why are water and trees so important to us? First-time readers can find out all of this on their own by going on a research trip with this volume. Simple, short texts make self-reading child's play. And thanks to different letter and crossword puzzles, search tasks, sudokus and stickers, reading practice is fun.