Learning about opposites has never been more fun — or funny — than with this winning board book. Yummy! Spaghetti is yummy, but worms — and blue crayons, and sand, and other things too gross to mention — are definitely yucky when tasted. Amiably illustrated in a bright, graphic style, Leslie Patricelli’s spirited board book,  Yummy Yucky  stars an obliging, bald, and very expressive toddler who acts out each pair of opposites with comically dramatic effect.