HappyDiggy My post isn't suggesting players refer to the Wiki site instead of coming to the Forum, and I'm sorry if it gave the impression it was. Nor was it intended to suggest you or any other player shouldn't ask a question to which the answer might be found at the Wiki site, or even that you should search there first. It was intended to point out that having an idea of how the Wiki site is set up and what might be found there can be very helpful in familiarising oneself with the basics of Diggy's Adventure. As you point out in your reply, you aren't familiar with the different terms applied to some things in the game. But giving a skim through the site might catch your eye on something you might want to further investigate that would familiarise you with something you want to know more about. A very small example of this is when I first started the game I had no idea what people meant by GC, but checking out the Dictionary at the site I discovered it meant God Children. If I told someone it would be a good idea for them to check out a map of a shopping center they were going to visit so they could understand the layout and what stores were there, that doesn't mean I am telling them not to go to the Information desk to ask any question they might have, even if any of those questions might be about something they could find out about by checking a map.
To answer your question about "Themes", they are called that because a theme is a particular subject matter or overall style of something. Don't know if you've ever been to a school dance or other special social gathering, but most of them have a theme and are decorated according to that theme. And when purchasing a Theme you can use it to decorate your Camp in the style of that Theme.