The Backyardigans is a TV show that aired on Nick Jr. from 2004 to 2010. My grandson really liked this show as a kid.
The great part about the series is that it can be interpreted in many ways. One might say that they are real animals while others may say that they are just human beings imagining they are animals. The story I'm going with is that 5 people (Uniqua (born October 11, 1967), Pablo (born June 1, 1970), Tyrone (born April 5, 1964), Tasha (born March 24, 1966), and Austin (born October 23, 1966)) who are trying to relive their childhood by imaging their animals at a combined backyard.