You may or may not have heard the term "greebles" or "kit-bashing" before, but if not, they may sound like nonsense. Particularly 'greebles', which sounds more like the name of a small, gremlin-like creature. However, I assure you that they are very important in prop-making, and if you can master them both, you'll be able to make intricate, great-looking props in hardly any time!