If you spot the bright colors of a poison dart frog, beware These animals ooze a toxin from their skin that can kill their attackers. How did they get their name? Their venom is so deadly that hunters in South America rub it on the tips of blow darts to make them poisonous. These are just some of the fascinating facts kids will discover as they explore the world of these deadly creatures. Large, eye-popping photos and clear, grade-appropriate text...