The animation for "When One Became Two," the first video from The Verve Pipe's great kids album A Family Album is by Ofir Sasson and reminds me of Shel Silverstein with some Dr. Seuss mixed in, very fanciful. It's a little rough in its animation style, which fits the organic and relaxed vibe of the song. They fit together very well.
The Verve Pipe - "When One Became Two" [YouTube]
(Hat tip: Gwyneth)