This delightful variation of "Old MacDonald Had a Farm" playfully introduces youngsters to the concept of ecosystems. Blurp. Croak. Quack. What is making those sounds? Come along with Jo MacDonald and learn about the wild creatures at the pond on her grandfather's farm. You'll find fish, frogs, ducks - and a few surprises. Author Mary Quattlebaum engages little ones with rhythm, repetition, wordplay, and onomatopoeia and illustrator Laura Bryant charms them with lively watercolors.