Nick Jr. Winter Wonderland is an album featuring ten covers of holiday songs by characters from various Nick Jr. programs. Cast members from The Backyardigans, Dora the Explorer, Go, Diego, Go! and Wonder Pets! lent their voices to the album.
Several tracks include casual conversations between characters that are not sung to a tune. The Backyardigans characters' speaking voice actors did not work on the CD, so their singing voice actors provide all non-musical dialogue for them. For example, Leon Thomas speaks casually for Tyrone in the opening of "Frosty the Snowman", despite how Jordan Coleman would normally provide this type of dialogue in the show.