For preschoolers, there was the educational television show "Barney & Friends" starting in 1992; their older siblings had the 1988 animated movie "The Land Before Time" and its increasing line of direct to video sequels (13 by 2016). "Dinosaurs", a television sitcom, parodied humans and other television shows. Of particular note is Michael Crichton's 1990 novel, "Jurassic Park", the popularity of which led to a series of films and other related media. The first of these, "Jurassic Park", married advanced CGI with advances in scientific knowledge of dinosaurs. The Disney film "Dinosaur" was the most expensive movie in 2000, but was a box-office success. The falling cost of computer-generated effects also has recently allowed the increased production of documentaries for television; the award-winning 1999 BBC series "Walking with Dinosaurs", the 2001 "When Dinosaurs Roamed America", the 2003 "Dinosaur Planet", the 2009 "Animal Armageddon", the 2011 "Dinosaur Revolution", and the 2011 "Planet Dinosaur" are notable examples.