How can you tell if something is living or nonliving? Introduce a set of criteria which can be used to determine which things are alive and which are not. The class discusses the basic needs of all living organisms, checks out an interactive site, practices identifying living things, and then completes a concept-reinforcing worksheet. The lesson plan concludes with an independent activity where little ones choose an image of one living and one nonliving thing; they'll glue the images on paper and draw pictures representing three things needed for survival.