Burning Man primarily features large scale interactive installation art inspired by the intersection of maker culture, technology and a connection to nature. Many works invite participation through climbing, touch, a technological interface or motion. Because of its principles of participation and radical inclusivity, much of outsider and visionary art, though a great variety of art forms appear during the event. Creative expression through the arts and interactive art are encouraged at Burning Man in many forms. Music, performance and guerrilla street theatre are art forms commonly presented within the camps and developed areas of the city. Artwork is placed in the open playa beyond the streets of the city and each year hundreds of isolated artworks, ranging from small to very large-scale art installations, often sculptures with kinetic, electronic and fire elements are brought to Black Rock City.