Nickelodeon (often shortened to Nick) is a worldwide cable televisionnetwork. Airing Mondays-Fridays from 6 a.m.-5 p.m. Saturdays from 6 a.m.-9 p.m. and Sundays from 6 a.m.-7 p.m. It is made for children. The network was started in 1983 as Pinwheel. During the late mornings and afternoons, Nickelodeon shows Nick Jr. This is a group of learningprograms and series for younger children. They are shown while the older children are in school. At night, the network shows Nick at Nite. Nick at Nite is a group of reruns of older series that parents watched when they were younger.