Little Big Bird is a 1989 Sesame Street cloth baby book made by Playskool. The interactive book shows Big Bird as an infant -- eating birdseed, playing in a crib, making a snowman, and taking a bubble bath.
In one continuity-defying illustration, Little Big Bird cuddles with a baby version of Mr. Snuffleupagus. (In the canonical version, Big Bird is fully-grown when he meets Mr. Snuffleupagus in the Sesame Street third season premiere.)