"Children love rocks. Rocks appear in jacket pockets, on windowsills, in the car, in their hiding places, and most often, in their little grips. Rocks are universal--they can be found in all climates, countries, and communities--making themselves available to anyone who craves the tactile pleasure of holding a perfectly sized, unfragile, unowned object. They can be collected, compared, stacked, plunked into water, painted, and shared. This book is...