Jack's Big Music Show is an American musical children's television series originally airing on Noggin and on the Nick Jr. television network.
 The show was produced by Spiffy Pictures, and was nominated for a 2008 Emmy award for Outstanding Pre-school Television Series.
Whoopi's Littleburg is an American musical children's television series originally airing on Nickelodeon and Nick Jr. It was created by Johnny Belt and Robert Scull, the latter of whom co-directed the show along with Tim Hill.
 "Whoopi's Littleburg" uses a blend of puppetry and live-action characters.
St. Helena Island is a Sea Island in Beaufort County, South Carolina, United States.
 The island is connected to Beaufort by U.S. Highway 21.
 The island has a land area of about 64 square miles and a population of 8,763 as of the 2010 census.
 It is included as part of the Hilton Head Island-Beaufort Micropolitan Area.
 The island is renowned for its rural Lowcountry character and being a major center of African-American Gullah culture and language.
 It is considered to be the geographic influence behind the children's television program "Gullah Gullah Island".
Eureeka's Castle is an American children's television series which aired on Nickelodeon's Nick Jr. block from September 4, 1989 until June 30, 1995.
 The program featured various puppet characters who live in a Giant's wind-up music box.
 The show was a joint development by Nickelodeon, animators Kit Laybourne and Eli Noyes of Noyes & Laybourne Enterprises, and the puppeteers at 3/Design Studio.
 R.L. Stine developed the characters and was the Head Writer for the episodes.
 Reruns of the show aired on Noggin from 1999 to 2002.
Kit Laybourne is a TV producer and educator.
 Laybourne was an executive producer of animation, documentary and interactive shows at Oxygen Network a company co-founded by his wife Geraldine and Oprah Winfrey.
 His major production credits include "Eureeka's Castle" and "Gullah Gullah Island" for Nickelodeon, "Liquid Television" for MTV, "Braingames" for HBO, and "Media Probes" for PBS.
 Most recently, he became Chief Creative Officer for The Whistle, a media company focusing on sports for kids.
4 O'Clock Club is a British comedy-drama and musical children's television series, which premiered on 13 January 2012 on CBBC and CBBC HD.
 A second series began airing on 4 January 2013, and the third series premiered on 20 December 2013.
 Series 4 began airing on 28 January 2015, and Series 5 was aired on CBBC and CBBC HD from February to May 2016.
Daniel R. Anderson (born 1944) is an American psychologist and a professor emeritus at the University of Massachusetts Amherst.
 Anderson specializes in developmental psychology and was involved in the creation of children's television series including "Allegra's Window", "Gullah Gullah Island", "Bear in the Big Blue House", "Blue's Clues", and "Dora the Explorer".
 He has also acted as an advisor to "Captain Kangaroo", "The Wubbulous World of Dr. Seuss", "Sesame Street", "Fimbles", "Go, Diego, Go!
", "It's a Big Big World", "Peep and the Big Wide World" and "The WotWots".
Vanessa Jennifer Baden-Kelly (born September 8, 1985) is an American actress, writer, director, and producer.
 She is best known for her roles as Vanessa Austin in "Gullah Gullah Island" and Kyra Rockmore in "Kenan & Kel".
Hillary Hawkins is an American actress, singer and writer.
 She introduced shows such as "Dora the Explorer", "Bob the Builder" and "Little Bill" on TV everyday as Robyn, Host of Nick Jr. As a child actor, she was Kate on "Are You Afraid of the Dark?
" (The Tale of the Jagged Sign), the singing voice of Vanessa on Gullah Gullah Island and Keisha on New York Undercover.
 Hillary has narrated audiobooks such as "Your Word Is Your Wand" and The Game of Life and How to Play It by Florence Scovel Shinn and "Creative Mind" and "Creative Mind & Success" by Ernest Holmes.
 Hillary attended Professional Children's School and has a Dual BA in Spanish & Creative Writing from Smith College.
Gullah Gullah Island is an American musical children's television series that was produced by and aired on the Nickelodeon network from 1994 to 1998.
 The show starred Ron and Natalie Daise, who also served as the cultural advisors, and was inspired by the Gullah culture of Ron Daise's home of St. Helena Island, South Carolina, part of the Sea Islands.

Question: Who is the producer of "Eureeka's Castle" and the American musical children's television series "Gullah Gullah Island?
Answer: Kit Laybourne