To introduce Living Things, we talked about the differences between living things and non living things. Then I let each student pick a living thing to make out of construction paper scraps. They glued it to a paper and wrote what made it a living thing; such as needs air, needs water, etc. I glued them all to a big tree to display in the hall.
This PowerPoint was used during our science unit about "Living and Non Living Things." The kids loved the real pictures and that it was interactive!