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?

<P0-S0> 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. <P0-S1>  It appears to work utilizing the two sets of right/left tracts to have the "interactive" mono audio segments. <P0-S2>  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. <P0-S3>  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). <P0-S4>  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. <P0-S5>  Because the toy contained an integrative book reader, some considered it an early lower tech version of the kindle. <P0-S6>  Talk'N play would say turn the page now. <P0-S7>  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. <SEP> <P1-S0> Dora the Explorer is an American educational animated TV series created by Chris Gifford, Valerie Walsh, and Eric Weiner. <P1-S1>  "Dora the Explorer" became a regular series in 2000. <P1-S2>  The show is carried on the Nickelodeon cable television network, including the associated Nick Jr. channel. <P1-S3>  It aired on CBS until September 2006. <P1-S4>  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. <P1-S5>  The series is co-produced by Nickelodeon Productions and Nickelodeon Animation Studio. <P1-S6>  "Dora the Explorer" is one of the longest-running shows of Nick Jr. <P1-S7>  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. <P1-S8>  It won a Peabody Award in 2003 "for outstanding efforts in making learning a pleasurable experience for pre-schoolers." <P1-S9>  It ended on June 5, 2014 after 8 seasons and 172 episodes. <SEP> <P2-S0> Go, Diego, Go! <P2-S1>  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. <P2-S2>  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. <SEP> <P3-S0> Harrison Chad (born July 17, 1992, in Plainview, New York, U.S.) is an American actor and voice actor. <P3-S1> ", the singing voice of Leo on "Little Einsteins" (2005-2009) and Cardigan from "". <P3-S2>  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". <P3-S3>  His roles include young Tarzan in the film "Tarzan 2", Boots on "Dora the Explorer" (2000-2007) and "Go, Diego, Go!