Idea concept build _ Sketch a concept, insert clip art or pictures, and use SmartArt to create a foundational visual... the base visual that you will build upon. Then add additional graphic components directly over the foundational visual. Alternatively you can create consecutive slides where you build increased complexity from the foundational slide so that you show how an idea concept develops and progresses layer_by_layer.
Internet makes you available lots of PowerPoint templates of varied categories on different topics. Most common categories are business, education, maps, animated, medical etc. Animated ppt templates are just awesome. They catch the interest of the audience and especially in case of medical templates it plays a very important role. By using animated templates in medical PowerPoint presentations you can easily explain your concepts in a wider way to your potential audience. Like if you are ready to make a presentation on heart and its functions than it would be easy to explain if you use animated template in your presentation because the image used in the template will show the pumping of heart and how the blood is flowing etc.