It is a grass like plant with long slender leaves, sometimes all green sometimes green with white stripes. It will shoot out a long strong "stem" that flowers and will have a tiny little replica of itself hanging like a lantern. You can pluck this off and set it in water where it will root, and then when it does, you can plant it and another spider plant will grow. Sometimes these plants are called airplane plants. These plants grow well for anyone and can take a lot of abuse. They do need repotted occasionally. They let you know when they need rewatered, because they appear droopy.
No, poinsettia plants generally are not poisonous to humans but yes, they are of low toxicity. The plants in question (Euphorbia pulcherrima) exude a latex which can be irritating with contact and even provoke temporary blindness if some enters the eye.