Children today have mastered smartphones and tablets with so much ease they've become a regular part of their lives. Why not marry education and entertainment by downloading the free wildlife app from the World Wildlife Fund? The interactive app brings endangered animals like elephants, whales, rhinos, butterflies and polar bears to life. Kids can chop bamboo for a panda or go on a "tiger vision" march. And there are even downloadable patterns to make wildlife origami from (recycled) paper at home.