Making “fly-throughs” or tours in Google Earth is relatively straightforward. You don’t need a paid version of the program and yet the results can be brilliant. Here is an example of a tour from the source of the Nile to the mouth.
Download Google Earth File “Nile Tour”
In order to play the tour, simply click on the unzipped folder (not the contents or the original zip file) when it appears in the Places window, and then click the play arrow as shown on the screenshot below:

The method is fairly straightforward, simply create placemarks of the desired tour locations and save them in a new folder. Re-arrange the placemarks in the order they should appear before playing the tour.
With a long tour like my Nile example it might be necessary to preview the individual placemarks to cache them locally so that the presentation plays smoothly.
The method is described in much greater detail at Google Touring. You can share your tour on this site too.
Thanks to Rob Chambers for his original query!

I can definitely recommend exploring this further - it is a great teaching tool. Thanks to Noel for providing instructions on this and for producing a fantastic fly through tour of the course of the Nile - I will be taking my Year 8’s on a virtual fieldtrip from Uganda to Egypt without them having to even leave their seats - fasten your seat belts - its Google Earth time!
Good find Noel.
I will explore these when I have time… When’s half term ?
I used the Nile tour twice this week - the students loved it! What an amazing resource Google Earth is! Thank you again Noel for putting this tour together.
thanks a lot
mai chahata hu ki muze jada se jada zoom image chahiye ya digital image chahiye usake liye kay karwai karna padegi ya kitana pay karna padega plz muze email per bheje