The numbers are on the loose--hiding and dancing, skipping and laughing through the rhymes of Mother Goose! It’s a good thing Caldecott Medal-winning artists Leo and Diane Dillon have helped gather up all these mischievous numbers in a stunning celebration of counting, rhymes, and imagination.    The rhymes, both familiar and lesser known, are ordered from simple (1, 2, 3) to more complex numbers, making this a collection to grow with. The illustrations are filled with surprising wit and whimsy. And this vibrant, playful volume is irresistible as an introduction to Mother Goose or as a new delight for her longtime fans.     Includes a note from the illustrators.