Book excerpt: Learning about opposites has never been more fun - or funny - than with this winning 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 book, Yummy Yucky stars an obliging, bald, and very expressive toddler who acts out each pair of opposites with comically dramatic effect.