Season 1 Nickelodeon , 2002 - 2003 Season 2 Treehouse , 2003 Season 4 Nickelodeon , 2009 Season 5 Nickelodeon , 2011 - 2012 Season 6 Nickelodeon , 2016 - 2018 Season 7 Nick Jr. , 2018 - 2019 Season 8 Nick Jr. , 2020 Season 9 Nick Jr. Season 10 Nick Jr.