The Fairground subtheme is part of the LEGO Creator Advanced Models theme and represents a number of sets that incorporate elemets of fairs and amusements rides including roller costers, carousels, ferris wheels and more. The first set, Grand Carousel, was released in 2009 and additional sets followed in 2014 with one or two releases yearly.
Advanced Models, also known as Creator containes sets focused on the creative construction of LEGO System parts as opposed to playability functions of minifigures, alothough many sets do contain minifigures. These sets include buildings, trains, vehicles and other complex contruction sets. The Advanced Models/Creator sets initially began in 2000 and was a replacement for the LEGO Designer theme.