The Cameraman episodes required clicking on each text bubble after reading it, in order to move on to the next. This was not obvious on the screen but was explained in the User Guide, which was brief but thorough. For the printable activities, there was not much information on the screen. However, printing did not print what was on the screen but rather a detailed activity sheet, e.g. to build a volcano. In Interplanetary Baseball, I found it difficult to make a bat selection in some cases.
Most activities depend on audio clues to figure out what to do.
There is an enormous amount of information, presented as interesting multi-media material in the Scrapbook. The games are designed to engage your interest in learning the educational content, and they encourage you to delve into the Scrapbook to find answers. The user interface was not always obvious, but could be discovered by clicking on screen objects, and the User Guide was well done.