Free Learn Addition on Orbital One is more than a demo and includes all the learn and test modules for the addition topic.  It does not contain the help sounds but does contain a large HTML help file with all the information you need to run the software.

Free Learn Addition on Orbital One  is in two parts:

1. Lessons 

There are 8 lessons covering addition Including two workout lessons. (see table below)

2. Test modules.

There are 27 tests included which ensure you understand the topic.