This Earth Day, celebrate our beautiful planet with an activity book that challenges scholars to show off their map skills, complete a crossword puzzle, write acrostic poems, alphabetize, and reflect on their personal Earth-friendly habits.

New Horizons set forth on a mission to Pluto in 2006. Ten years later, the spacecraft is still on its way. Here, enthusiastic scholars predict what they will be like—likes, dislikes, hobbies, etc.—when New Horizons arrives at its...