When you have imported a set of 3D models to the My Places folder in Google Earth, you can then record a tour of them in various ways. You can view a short video about doing so here. (3 minutes) Enjoy!
Tip: One way of showing up all the 3D models in an area on Google Earth is to set the time slider to apply darkness. The models will stand out as if they were lit against a dark landscape. You can even cycle the apparent time through daylight – with the shadows rotating – and back into darkness while recording a tour.