Question: In which American animated educational interactive children's television program,  created and executive produced by Chris Gifford and Valerie Walsh, did Harrison Chad have a role?

Context articles: Go, Diego, Go!
The Simpsons (season 5)
Reading Rainbow
Chris Gifford (actor)
Talk 'n Play
Arthur (TV series)
Ni Hao, Kai-Lan
High Street Blues
Harrison Chad
Dora the Explorer

Go, Diego, Go!
 is an American animated educational interactive children's television program that originally aired on the Nickelodeon children's cable network in the United States and produced by Nickelodeon Animation Studio.
 Created and executive produced by Chris Gifford and Valerie Walsh, the series is a spin-off of "Dora the Explorer" and follows Dora's cousin Diego, an 8-year-old boy whose adventures frequently involve rescuing animals and protecting their environment.
"The Simpsons"' fifth season originally aired on the Fox network between September 30, 1993 and May 19, 1994.
 The showrunner for the fifth production season was David Mirkin who executive produced 20 episodes.
 Al Jean and Mike Reiss executive produced the remaining two, which were both hold overs that were produced for the previous season.
 The season contains some of the series' most acclaimed episodes, including "Cape Feare" and "Rosebud".
 It also includes the 100th episode, "Sweet Seymour Skinner's Baadasssss Song".
 The season was nominated for two Primetime Emmy Awards and won an Annie Award for Best Animated Television Program as well as an Environmental Media Award and a Genesis Award.
 The DVD box set was released in Region 1 on December 21, 2004, Region 2 on March 21, 2005, and Region 4 on March 23, 2005.
Reading Rainbow is an American half-hour children's television series that aired on PBS Kids from June 6, 1983, to November 10, 2006, with a total of 155 half-hour episodes spanning over 21 seasons.
 The show encouraged children to read.
 In 2012, an iPad and Kindle Fire educational interactive book reading and video field trip application was launched bearing the name of the program.
Chris Gifford (born May 3, 1959) is a writer and executive producer at Nickelodeon, where he co-created the Peabody Award-winning children's series "Dora the Explorer" where he was the voice of the Big Red Chicken, the Grumpy Old Troll, the Pirate Captain Pig, etc. and its successful spin-off "Go, Diego, Go!
".
 He was also a cast member (Danny) on the 1980s syndicated children's series, "The Great Space Coaster".
Talk 'n Play was an American interactive desktop educational toy book reader with a built in microphone and action buttons that was sold from 1983 to 1992 as an entertaining and educational toy manufactured by CBS Toys, Hasbro, and Kiddesigns.
 It appears to work utilizing the two sets of right/left tracts to have the "interactive" mono audio segments.
 It then also provided a record capability so as a child could ad in their own voice and create interactions with characters on the program.
 It was invented and Patented by Michael J. Freeman Ph.D. and licensed for use by the Children's Television Workshop (owners of Sesame Street) and the Walt Disney Company, among others (see list below).
 Similar to adapted 4 channels of educational information (and recordings from the child) to produce interactivity, but the main voices were created and produced by Sesame Street and Disney characters under License.
 Because the toy contained an integrative book reader, some considered it an early lower tech version of the kindle.
 Talk'N play would say turn the page now.
 Story programs were produced by othwers Talk'N Play had many music programs where children could add in or take out, different instruments as the song is played.
Arthur is a Canadian/American animated educational television series for children, created by Cookie Jar Group (formerly known as Cinar) and WGBH for PBS.
 The show is set in the fictional American city of Elwood City, and revolves around the lives of 8-year-old Arthur Read, an anthropomorphic aardvark, his friends and family, and their daily interactions with each other.
Ni Hao, Kai-Lan (; "Hello, Kai-Lan") is an American animated (anime-influenced) interactive children's television series which premiered on Nickelodeon on November 5, 2007, and on Noggin (now Nick Jr.) on December 15, 2008.
 It also premiered on the Canadian television channel Treehouse TV.
High Street Blues was a short-lived British television sitcom series produced by LWT for ITV from 6 January to 10 February 1989.
 It ran for six episodes, each 30 minutes long.
 The series starring Phil McCall, Ron Pember, Elizabeth Stewart, Georgia Mitchell, Valerie Walsh, Chris Pitt, Victoria Hasted, Martin Turner, Johnny Shannon, Eve Bland and Shirley Dixon.
Harrison Chad (born July 17, 1992, in Plainview, New York, U.S.) is an American actor and voice actor.
 His roles include young Tarzan in the film "Tarzan 2", Boots on "Dora the Explorer" (2000-2007) and "Go, Diego, Go!
", the singing voice of Leo on "Little Einsteins" (2005-2009) and Cardigan from "".
 He also has performed in a number of live-action movies, such as the Comedy Central movie, "Hebrew Hammer" and the Showtime movie, "Carry Me Home".
Dora the Explorer is an American educational animated TV series created by Chris Gifford, Valerie Walsh, and Eric Weiner.
 "Dora the Explorer" became a regular series in 2000.
 The show is carried on the Nickelodeon cable television network, including the associated Nick Jr. channel.
 It aired on CBS until September 2006.
 A Spanish-dubbed version first aired as part of a "Nick en español" block on NBC Universal-owned Telemundo through September 2006; since April 2008, this version of the program has been carried on Univision as part of the "Planeta U" block.
 The series is co-produced by Nickelodeon Productions and Nickelodeon Animation Studio.
 "Dora the Explorer" is one of the longest-running shows of Nick Jr.
 During the sixth season, the show became the Nick Jr. series with the most episodes, surpassing "Blue's Clues" with 143 episodes, having 144 after it had completed broadcasting on television.
 It won a Peabody Award in 2003 "for outstanding efforts in making learning a pleasurable experience for pre-schoolers."
 It ended on June 5, 2014 after 8 seasons and 172 episodes.