Oleander is one of the most toxic and poisonous plants. All parts of this beautiful plant are equally toxic with many types of toxins like Oleandrin and Neriine. These toxins attack a person’s heart, so you can imagine how toxic this beautiful plant is. Do not forget to guide your kids about this plant as the plant generally found at schoolyards and playgrounds. If the plant gets ingested in any part of the body it can be highly dangerous for anyone, even children.