Wonder Pets is a 2006 Children 's television series that currently airs on Nick Jr. and is based on the short Nick Jr. 's film series which was called Linny the Guinea Pig . Wonder Pets is an American animated children 's television series . It debuted on March 3 , 2006 , on the Nick Jr. block of the Nickelodeon cable television network and Noggin ( now Nick Jr. ) on August 31 , 2006 .