Poison dart frogs are cute and tiny. They come in many eye-catching colors. These colors, however, aren't meant to make them attractive. The bright colors tell other animals that they shouldn't try to eat them. These vibrant amphibians are covered with a deadly poison that makes predators very sick. It's so strong that some Native American tribes even used it to make poison darts for hunting. Readers will surely enjoy getting up close to these small but deadly poison dart frogs.