The%20latest%20addition%20to%20the%20best-selling%20Backpack%20Explorer%20series%20(455%2C000%20copies%20in%20print)%20invites%20kids%20ages%204%20and%20up%20to%20head%20outside%20and%20find%2C%20collect%2C%20and%20learn%20about%20rocks%20with%20this%20take-along%20activity%20book!%20Backpack%20Explorer%3A%20Rock%20Hunt%20is%20packed%20with%20prompts%20and%20activities%2C%20including%3A%2012%20interactive%20field%20guide%20pages%20introducing%20rock%20classifications%20(color%2C%20shape%2C%20size%2C%20texture)%3B%20sensory%20scavenger%20hunts%3B%20hands-on%20outdoor%20creative%20activities%3B%20rock%20experiments%3B%20and%20discovery%20zone%20pages%20with%20facts%20about%20geology%2C%20landforms%2C%20igneous%20and%20metamorphic%20rocks%2C%20gems%2C%20fossils%2C%20and%20more.%20The%20book%20includes%20a%20real%20magnifying%20glass%2C%20stickers%2C%20and%20a%20log%20for%20recording%20rock%20finds%2C%20making%20it%20the%20perfect%20explorer%20guide%20for%20budding%20geologists%2C%20whether%20in%20a%20backyard%2C%20a%20city%20park%2C%20or%20a%20nature%20preserve.