For beginners, these are excellent projects to start with. The files include easy to read plans, as well as a photograph of the finished product. I have seen all these projects in action running on air, and they run exceptionally well. If you are not an experienced artisan and are looking at building a live steam project, here would be an ideal place to start.
 
These projects will certainly help you understand the fundamentals of the working of steam. I will add more plans once I have edited them and converted them into easier to read plans, so watch this space?