Nickelodeon Playdate Split Screen Credits (September 28, 2011/RECREATION)
after The Backyardigans it's The Mighty B!
yes, according to Nickstory Archives, the Noggin on Nick Jr. block (by the time it was called Nick Jr. on Nick Playdate) has last aired on that day, and Nicktoons on Nickelodeon block starts at 2:00pm to 6:30pm and the 2006 Nick Rewind block starts 6:30pm to 9:00pm.