In this variation on the classic song "Over in the Meadow," mother and father trucks show their youngsters how to build down at the construction site, from "mama bulldozer with her little dozer one" to "mama steamroller with her little rollers ten."

"Ducks overboard!" shouts the captain, as a giant wave washes a box of 10 little rubber ducks off his cargo ship and into the sea. One drifts west, where a friendly dolphin jumps over it. A whale sings to another. But as the sun sets, the 10th little rubber duck is left all alone, bobbing helplessly on the big wide sea. Following the little ducks as they float to all parts of the globe, young explorers can see for themselves the meanings of directional...