Open the Door, Little DinosaurBoard Book - 1993
Illustrated in full color. Little Dinosaur can't find his mom! Kids can help him look for her behind the front door, up in the treehouse, beneath a pile of leaves, and all around the house. When they find her, she has a very big surprise for Little Dinosaur--a brand-new baby sister!
Publisher: Toronto : Random House, c1993.
Characteristics:  p. :,col. ill. ;,23 cm.