SketchUp is easy to use and creating the 3D design model and so flexible to use. It helps to add details to your model and create more detailed models. This details models are more become proficient with SketchUP and that is contain many features allow you to create different models.
SketchUp helps to add more details and your model looks like realistic. Interesting thing is adding people to sketchup model. It is same in all version. First go to the Main menu at the top and follow like this:
File -> Edit -> Window-> Components.
Component collection allow you to easily add details. This Component contain different component materials like people, cars, trees etc. You can create the people component from pre-existing component or create yourself. But one thing is these individual component collection are available in Google 3D Warehouse.