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Interactive textbook lets kids get hands on with concepts.
Eye-catching app gives kids a peek at body's inner workings.
Devices: iPhone, iPod Touch, iPad, Android, Apps for Windows
Coax trees toward the light in absorbing, artful puzzler.
Devices: iPhone, iPod Touch, iPad
Kids create crazy animal combos in fun but repetitive app.
Devices: iPhone, iPod Touch, iPad, Android, Fire phone, Kindle Fire