Character Building is a company that makes cheap knockoffs of LEGO but somehow manage to charge even more for their products than LEGO do. This company is important however as it created Doctor Who building sets years before LEGO even considered the ridiculous idea. This started in 2010 with sets based on Series 5 episodes (and some simplistic concepts from the show) as well as a lucky dip with figures that was also ripped off from LEGO. Needless to say the sets were often cheap and low quality, but Whovians had no alternative, so it sold like crazy. It's reign was ended a few years later however when LEGO made a set of infinitely better quality, meaning that there was no need for Character Building anymore, RIP CB.